We have long known that flowers “train” their pollinators, rather than the other way around.  Generations of adaptations go into a flower-pollinator “fit” like this one, and the reward for the pollinator’s hard work is being able to access a resource that no one else can (unless they cheat and tunnel into the flower’s base, of course).  https://www.smithsonianmag.com/smart-news/new-madagascan-moth-species-holds-tongue-record-with-nearly-foot-long-proboscis-180978834/?utm_source=smithsoniandaily&utm_medium=email&utm_campaign=20211007-daily-responsive&spMailingID=45744650&spUserID=ODg4Mzc3MzY0MTUyS0&spJobID=2100749469&spReportId=MjEwMDc0OTQ2OQS2.

OK – the BugLady is ambivalent about this one; in fact, she once turned down an offer to appear in the same program with someone who created magnificent art pieces with dead insects.  She supposes that’s a way to sneak in the back door when people aren’t insect enthusiasts, but no insect is ever harmed in the making of a BOTW.

https://www.smithsonianmag.com/arts-culture/the-creepy-crawling-history-insect-art-180979288/?utm_source=smithsoniandaily&utm_medium=email&utm_campaign=20211223-daily-responsive&spMailingID=46155101&spUserID=ODg4Mzc3MzY0MTUyS0&spJobID=2142675899&spReportId=MjE0MjY3NTg5OQS2.

Another argument for clean air – and another example of how, when the dominos start to fall, they build momentum: https://www.smithsonianmag.com/smart-news/air-pollution-makes-it-harder-for-insect-pollinators-to-find-flowers-180979465/?utm_source=smithsoniandaily&utm_medium=email&utm_campaign=20220126-daily-responsive&spMailingID=46307031&spUserID=ODg4Mzc3MzY0MTUyS0&spJobID=2162879922&spReportId=MjE2Mjg3OTkyMgS2.

It’s never too early to think about mosquitoes: https://www.smithsonianmag.com/blogs/national-museum-of-natural-history/2021/08/19/secret-life-worlds-most-hated-insect/?utm_source=smithsoniandaily&utm_medium=email&utm_campaign=20210819-daily-responsive&spMailingID=45486503&spUserID=ODg4Mzc3MzY0MTUyS0&spJobID=2064448016&spReportId=MjA2NDQ0ODAxNgS2.

Kleptoparasites are animals (in this case, insects) that take advantage of another insect’s hard work, robbing them of the fruits of their labor: https://whyevolutionistrue.com/2021/11/06/readers-wildlife-photos-1454/.

Getting by with a little help from Mom: https://www.nationalgeographic.com/animals/2019/02/wasp-eggs-fumigate-nests-with-gas/?cmpid=org=ngp::mc=crm-email::src=ngp::cmp=Editorial::add=Animals_20190214::rid=2030610309.

And speaking of adaptations that allow an organism to take advantage of the existing resources: https://phys.org/news/2021-11-bees-dead-meat-eating-vulture-sport.html?fbclid=IwAR3sNnjf3PbkGkp_Jvhj_3MptabVaCz6dZuIJHIWP_61_KHPLHLfGnzNJdM.

People always want to know if millipedes really have 1,000 legs.  Most fall far short, but… https://www.smithsonianmag.com/smart-news/finally-a-millipede-that-actually-has-1000-legs-180979269/?utm_source=smithsoniandaily&utm_medium=email&utm_campaign=20211220-daily-responsive&spMailingID=46136420&spUserID=ODg4Mzc3MzY0MTUyS0&spJobID=2142287410&spReportId=MjE0MjI4NzQxMAS2.

And finally, a timely issue from the UW Madison Department of Entomology’s Insect Diagnostic Lab newsletter https://insectlab.russell.wisc.edu/2022/01/31/insects-on-snow/.  You can subscribe to this one, too.  (Go Outside – Look for Bugs!)

Feb 2 is Groundhog Day.  In Wisconsin that means that if the groundhog sees its shadow, winter will last another month and a half, and if it doesn’t see its shadow, we have six more weeks until spring. 

Kate Redmond, The BugLady

Bug of the Week archives:
http://uwm.edu/field-station/category/bug-of-the-week/

This is not your grandfather’s fritillary (unless your grandfather is a Southerner).  Gulf Fritillaries are in the Brush-footed butterfly family Nymphalidae, along with a whole bunch of familiar Wisconsin butterflies, and they’re with the fritillaries in the subfamily Heliconiinae (which used to be its own family).  But, unlike our familiar fritillaries, they’re in the tribe Heliconiini, aka the Heliconians or Longwings, many of which occur in tropical climes and have long, slim, spectacular wings https://bugguide.net/node/view/1480877/bgpage, https://bugguide.net/node/view/1478862/bgpage, https://bugguide.net/node/view/309768/bgimage.  The larvae of many Heliconians feed on parts of passion vines and leaves, and the adults eat nectar of a number of flowers, plus fruit and sap, and many make or save toxic chemicals for defense.  Adults often spend the night in communal roosts https://bugguide.net/node/view/6260/bgimage (a group of butterflies is called a roost or bivouac).   

The Gulf Fritillary (Agraulis vanillae) (Dione vanillae in some books) is also known as the Passion butterfly because of its caterpillar host plant, and the Online Guide to the Animals of Trinidad and Tobago refers to it as the Silver Spotted Flambeau.  Carl Linnaeus gave it the species name “vanillae” based on a life cycle painting of the butterfly on a vanilla plant https://www.rct.uk/collection/921180/vanilla-with-gulf-fritillary done by the amazing 18^th century naturalist/painter Maria Sibylla Merian, but the species doesn’t use vanilla plants.  If you’re not familiar with her, here she is https://en.wikipedia.org/wiki/Maria_Sibylla_Merian. 

Its range is described as Neotropical, which covers the ground from central Mexico and the Caribbean to southern South America.  In North America it is most common across our southern tier of states and the West Indies, and less so as you travel north http://mothphotographersgroup.msstate.edu/species.php?hodges=4413.  It’s one of the most common butterflies some in parts of Florida, where it has multiple generations per year; it was introduced to Southern California in the late 1800’s and is established there; it’s also established in Hawaii, and it has been recorded in Guam.  Gulf Fritillaries fly north in spring, breeding across the Southeast, and move back south again in fall, with Florida seeing dramatic migrations in both directions.    

It has a wingspan of two-and-one-half to almost four inches; females are larger than males and may have darker markings https://bugguide.net/node/view/666672/bgimage.

Courtship is exotic.  As a male and female circle each other in the air, he calms her flight response by releasing aphrodisiac courtship pheromones from “hair pencils” on his abdomen, and after she perches, he may hover above her, dusting her with more pheromones.  He perches beside her, they shift to face each other at a 45 degree angle, and he claps his wings open and closed, enveloping her antennae with each clap, delivering more pheromones from structures on the top side of his front wings and letting her know he is the same species (butterfly eyesight isn’t that great).  For Gulf Fritillaries, it’s “Ladies’ Choice” – females actively pick the males they mate with, so he really has to sell it. 

Rabbit hole #1: If she accepts his advances, his sperm packet, delivered when they mate, includes what’s called a nuptial gift.  The BugLady has written about nuptial gifts in spiders, katydids, tree crickets, and dance flies, but she had no idea that some butterflies produce them (they’re an energy-intensive investment for the male).  The sperm packet includes nutrients that will help her form eggs.  In the case of one of the European Comma butterflies (Polygonia c-album), the spermatophores are edible, containing both food and sperm, and the female, who mates with multiple males, can rate a male by the quality of plants he ate as a caterpillar (nettle is preferred) (Toto, I don’t think we’re in Kansas anymore).  

She lays her eggs, one by one, on or near a passion vine (purple passionflower has the best flower ever https://en.wikipedia.org/wiki/Passiflora#/media/File:OQ_Passion_flower.jpg), usually on the top surface of a leaf.  When they hatch, the caterpillars eat their egg shells – and sometimes neighboring eggs – and then start in on the leaves, often feeding in small groups.  

In the far southern US, Gulf fritillaries are in the air all year long, producing multiple generations.  They are said to overwinter as adults, but one researcher concluded that after passion vines die back in Florida in early winter, caterpillars can survive in diapause (dormancy – they halt development and resume when conditions improve).  They can also enter diapause in the chrysalis stage, though temperatures under 30 degrees are not good for them (or for most Floridians).  Here’s a nice series of a caterpillar forming a chrysalis https://bugguide.net/node/view/1589936/bgimage.  

Gulf Fritillaries are well-defended.  Adults can produce stinky fluids when alarmed.  The vegetation of many passion vine species is chock full of chemicals including glycosides that release cyanide when eaten, alkaloids, and strychnine and nicotine relatives, making their caterpillars a bad choice for predators.  And if that weren’t enough, the caterpillars are spiny https://bugguide.net/node/view/2047275/bgimage. 

Rabbit hole #2 was peripheral and was kind of like when you find out that deer eat baby birds (yes, deer eat baby birds, and so do chipmunks). 

In order to produce mating pheromones and “build” nuptial gifts, male butterflies in some species in the subfamily Danainae (the Milkweed and Glasswing butterflies) may want to boost their alkaloid load.  They can get extra alkaloids by scratching toxic leaves with claws on their tarsi (feet) and sipping the resulting sap, but researchers in the Sulawesi area of Indonesia noticed that some Danaine upped the ante by ingesting chemicals from caterpillars that had been feeding on plants in the dogbane family (which is closely related to milkweed).  Seven species were observed scratching dead or dying caterpillars and sipping the fluid (researchers don’t know if the scratching part had contributed to the dead and dying part).  They went after healthy caterpillars too (“subdued them” said the researchers), to harvest the toxic chemicals that the caterpillars sequester from their food plants for their own defense.  In their defense, it may be that the butterflies were attracted to leaves that were already scratched and oozing, and the caterpillars were just in the neighborhood.  Scientists had to coin a new term for this unique practice – “Kleptopharmacophagy” – literally “stealing chemicals for consumption.” 

One of the researchers, Yi-Kai Tea, referred to caterpillars as “essentially bags of macerated leaves; the same leaves that contain these potent chemicals the milkweed butterflies seek out.” Fortunately, our iconic Monarch has not (yet) been implicated in this behavior, which is a good thing because the BugLady wouldn’t be able to look one in the eye.

The great Roger Tory Peterson once said that a good birder always looks twice.  In his 1970 book Butterflies of Wisconsin, Ebner dismissed some early Gulf Fritillary records as “rather dubious,” and the Wisconsinbutterflies.org website lists it as a rare stray to the state.  Gulf Fritillaries are pretty distinct, but if you glance at a large fritillary and are about to write it off as another Great Spangled Fritillary https://bugguide.net/node/view/1990523/bgimage, https://bugguide.net/node/view/1887246/bgimage, give it a second look, just to be sure.  

Kate Redmond, The BugLady

Bug of the Week archives:
http://uwm.edu/field-station/category/bug-of-the-week/

Its reputation as a nest-robber (mostly-undeserved) and its feistiness at the feeder make it unwelcome in some backyards, but its antics endear it to many feeder-watchers (including the BugLady), who secretly confess, “I know it’s a troublemaker, but I love watching it.” Its role as the neighborhood watchdog benefits other songbirds. And, it plants trees.

Ravens, crows, and Blue Jays (Cyanocitta cristata) are members of the Crow family and are considered to be very intelligent birds. As proof, scientists point to the richness of their vocabulary and the tightness of their family bonds. Blue Jay vocalizations are complex, and along with their loud “Jay, Jay” and “pump handle” sounds, they have a number of softer, more “conversational” call notes.

They can imitate the calls of several species of hawks, though scientists aren’t sure whether the jay is checking to see if hawks are around, is psyching out other songbirds, is scaring everyone else away from the feeder, or is just having fun. If it encounters a bird of prey, a Blue Jay’s excited “mobbing calls” attract other birds to harass the predator. A glance at its expressive crest can tell you if a bird is scared (a bristling crest), aggressive (an erect crest), or peaceful (a flat crest).

Males and females collaborate to build a cup-shaped nest, preferably in an evergreen, in which the female lays an average of four or five eggs. Totally helpless when they hatch, young Blue Jays continue to be incubated for a week or two, and they stay with their parents for two months. Both parents care for them.

Blue Jays are never totally absent in winter from the territory they inhabit in summer, but their migratory habits are quirky. Studies are contradictory, suggesting that from fewer than 20% to almost 50% of Blue Jays migrate in a given year, and huge flocks can be seen along the Great Lakes and Atlantic coasts (this fall, a hawk counter on the shores of Lake Michigan tallied more than 2,600 jays in four hours!).  While both old and young birds may migrate, some birds travel one year and not the next, and one banded Blue Jay become a first-time migrant at the age of five.

They migrate by day, coming down for a rest around midday and then resuming their flight. Blue Jay migration is probably food-driven, and the increasing popularity of bird feeders may encourage them to stay home. These are not long-distance migrants – many travel only a few hundred miles – but migration is still a dangerous undertaking, and birds that stay home tend to live longer.

Blue Jays measure nine to twelve inches – a little bigger than a robin – and males and females look alike. Their feathers are actually a dull brown, the blue color caused by physics, not by pigments (life is physics). It’s called a “structural color,” and it’s the result of the light bouncing off of feather barbs and being scattered by tiny air pockets in the feather’s “skeleton.”

They are omnivores, but only about one-quarter of their diet consists of animals like insects, spiders, snails, small frogs, mice or salamanders. Fruit, seeds, and nuts make up the rest (they are frequent flyers at the BugLady’s peanut feeder), and most of what they eat is wild, not cultivated. They may cache food, hiding it for later use, although in 1895, an observer noted that jays do not cache food unless they are permanent (rather than summer) residents of an area. According to the Cornell University Lab of Ornithology’s All About Birds site, “Their fondness for acorns is credited with helping spread oak trees after the last glacial period.”

Blue Jays are preyed on by hawks, and their eggs and nestlings are eaten by squirrels, cats, hawks, owls, crows and raccoons. Although the record for a wild bird is seventeen years, a seven-year-old Blue Jay is an old Blue Jay. Both jays and crows have been hit hard by West Nile Virus.

So, the Blue Jays that spend the winter at your feeder might be the same crew that you fed all summer, or they could be birds that migrated south to get there and replaced the summer residents, or they could be a little of each.

[Credit where credit is due: A version of this article (written by the BugLady, wearing a different hat) first appeared in The BogHaunter, the newsletter of the Friends of the Cedarburg Bog.]

Kate Redmond, The BugLady

Bug of the Week archives:
http://uwm.edu/field-station/category/bug-of-the-week/

Back in 2015, the BugLady suspended operations during the month of May, posting a teaser at the start of her month off – a fern fiddlehead with an ant crawling on it.  When she resumed her posts in June, she led with the story of that ant.  Here it is:

The results of taking off the month of May are in: many pictures of plants, flowering and non; not so many pictures of insects, even though the BugLady was checking plants like wild geranium, dandelions, and autumn olive that put out masses of flowers.  It’s a little worrisome.  The nannyberry is hopping, though – sweat bees, small twitchy wasps, syrphid/hover/flower flies, an occasional honeybee, etc.  And the first crop of dragonflies is emerging.  The other bit of fallout was that with no Tuesday deadline to aim for, the BugLady was, for the most part, clueless about which day of the week it was.  Adrift.

As promised, the story of the fern and the ant, a story that comes with a side order of botany.

It is hardly breaking news that plants produce nectar, a sugary liquid that the plant makes in nectaries that are located within the flowers.  Along with sugars, nectar may include amino acids, oils, vitamins, proteins, and more.  Why do they do it?  To attract the moths, bees, wasps, butterflies, and even hummingbirds and bats that inadvertently fertilize plants by carrying pollen to the next flower they visit.  “I feed you; you fertilize me.”  After fertilization, a plant may reabsorb its nectar.

BUT – a fair number of plants produce nectar in places other than their flowers, and these areas, called Extrafloral nectaries (EFN), don’t have anything (directly) to do with pollination.  EFN may be found on flower stalks, leaf axils, petioles, or leaf margins, or on various flower parts, and the nectar they provide is sweeter than the plant’s sap.  Some EFN are conspicuous; others are not http://edis.ifas.ufl.edu/in175.   Bracken ferns, which are non-flowering plants, have EFN at the bases of their three fronds as those fronds are just starting to unfurl.

Why do they do it?  EFN were originally (and erroneously) thought to be a waste disposal system for the plant, allowing it to get rid of metabolic by-products.  And while scientists are still not 100% sure why plants make EFN, they are probably there for ants and other predatory insects like ladybugs.

EFN could be decoys – “I feed you here, and you stay away from my flowers.”  It turns out that ants, despite their notable presence on flowers, are seldom effective pollinators.  Their exoskeletons are slick and are groomed frequently; they are pedestrians, which limits the number of flowers they can visit; and they don’t exhibit the “flower constancy” of bees, who will concentrate on a particular type of flower on a foraging trip, thus increasing the odds that the pollen they carry will be deposited on the correct species.  Plus, an antibiotic secreted by some ants and found on their exoskeletons kills pollen.  Ants do love nectar, though, and they may hog the nectar without delivering the payload and damage a flower in the process.

In the case of the bracken fern and its ants, it has always been assumed that EFN produce a reward for services rendered – an “I feed you; you protect me from herbivores” scenario – but here’s where it gets a bit sticky, scientifically.  Studies that measure the degree of protection contradict each other.  Researchers in the 1960’s described significant benefits to the fern foliage; recent studies suggest that while some grazers might be chased away in the early days as fronds are uncurling (when the plant produces the most sugar), there’s not a significant difference in foliage on ant vs ant-free ferns by the end of the season (when sugar secretion is very low).

Post-floral or pericarpial nectaries (PN) are much less common.  Some plants continue to produce nectar around the base of the flower after the petals fall and throughout the development of the fruits.  The foraging ants thus protect the seeds (or not, say some studies).  Apparently, garlic mustard has this in its bag of tricks.

Besides protection, ants provide other services to plants.  In exchange for food (and sometimes shelter – some plants have special structures where ants can live), foraging ants keep leaf surfaces clean, which helps keep plants fungus/disease-free.  Ants may prune or thin vegetation, optimizing growing conditions and reducing competition, and they may assist with seed dispersal.

Ant-plant interactions enjoy a lovely vocabulary.  A myrmecophile is an organism (usually an animal) that consorts with ants; myrmecophily (“ant-love”) refers to favorable relationships between ants and other organisms; and a myrmecophyte (“ant-plant”) is a plant that carries on mutually beneficial relationships with ants.  Through a process called myrmecochory (ant-dispersal”), ants spread and plant many wildflower seeds (according to some sources, ants “plant” almost one-third of spring ephemerals in eastern North America.  Bloodroot is one of them).  Attached to the seeds is an ant-attracting “packet” called an elaiosome.  After toting the seeds back to their nests, ants break off the elaiosome and eat it, leaving the seed to germinate.

There are close to 4,000 plants worldwide, in more than 100 plant families, in 745 genera, that grow EFN Thirty-nine are fern species.  Familiar practitioners include vetches (Vicia), gourds (Cucurbita), wild cherry (Prunus), elderberry (Sambucus), locust (Robinia), willow (Salix), wild sunflower (Helianthus), milkweed (Asclepias), and peony.  The BugLady found some on the petiole (leaf stem) of a high-bush cranberry.  When she first posted this, “The World List of Plants with EFN” was temporarily off-line.  It’s back http://www.extrafloralnectaries.org/.

Go outside – watch ants.

Kate Redmond, The BugLady

Bug of the Week archives:
http://uwm.edu/field-station/category/bug-of-the-week/

BALTIMORE BUTTERFLIES are exquisite butterflies with intricate lifestyles.  Eggs are laid en masse on their host plants (turtlehead, swamp lousewort, hairy beardtongue, and English plantain (a recent menu addition)), and newly-hatched caterpillars throw a web around the leaves https://bugguide.net/node/view/1614036/bgimage and feed en masse.  They overwinter in little clumps of partly-grown caterpillars inside rolled leaves on the ground, wake up in spring to a world devoid of turtlehead (a late summer plant), and switch their diets to the leaves of white ash (alas), arrowwood, wood betony, and a few others.  Later, they form a really spiffy chrysalis https://bugguide.net/node/view/117720/bgimage and then a dynamite butterfly.  Here in God’s country, they’re associated with wetlands, but in some parts of their range, they’re found in dry, open areas.

When the BugLady first wrote about the amazingly-colorful BLACK-LEGGED MEADOW KATYDID in 2013, she said that their faces are a little creepy.  She hasn’t changed her mind.  Find out more about them at https://uwm.edu/field-station/black-legged-meadow-katydid/.

DADDY LONGLEGS (sometimes called Harvestmen) ply the vegetation (and ground and walls and tree trunks) looking for small invertebrates to eat.  Although they are in the class Arachnida (along with spiders, scorpions, ticks, mites, and some others), they are in the daddy longlegs order Opiliones, rather than the true spider order Araneae.  They have eight legs and use six for walking; the other two are outfitted with lots of joints, so they’re extra-bendable, and with hair-like sensory receptors that they wave around as they go.  They don’t make silk, and they don’t make venom, but they do make stinky defensive chemicals, and if they’re alarmed, they may play possum.  They do not bite people – their mouthparts are simply too small.

This female EASTERN PONDHAWK DRAGONFLY, like other odonates, is an unapologetic carnivore, and her prey choices sometimes get close to home, taxonomically.  She is about to tuck into a male Eastern Forktail damselfly.

Some of our most common LIGHTNING BUGS/FIREFLIES are in the genus Photinus (there’s a good chance that this one is the Common Eastern firefly, Photinus pyralis).  Two cool things about Photinus: 1) their larvae https://bugguide.net/node/view/1653943 live underground, and “packs” of them may get together to hunt earthworms; and 2) each species of firefly has its own flashing code, to which the females (flightless in some species) respond with their own Morse code.  Game on.  But female fireflies from a different genus – Photuris – copy the Photinus signal, lure in an unsuspecting male Photinus, and then eat him.

Why?  Photinus fireflies pack a nasty-tasting defensive chemical (lucibufagin), which discourages predators like Phidippus jumping spiders, some songbirds, and possibly bats.  Photuris doesn’t produce defensive chemicals, but in eating him, she gets a good meal (the extra nutrition helps her make better eggs) and lucibufagin, too.  It makes her distasteful and, like a Photinus female, she passes it on to her eggs (it may protect them from ants).  https://news.cornell.edu/stories/1997/09/cornell-biologists-report-mimicry-and-murder-night

SWAMP SPREADWING DAMSELFLIES – Mating and ovipositing activity in dragonflies and damselflies often attracts a crowd – third party males hope to snag the female, dislodge the first male’s sperm, and replace it with their own.  That’s why the males of many Odonate species guard their brides, sometimes from the air or from a perch, but often by continuing to clasp the back of the female’s head.  Male number two (on the right) harassed this couple for a few minutes before moving on.

One chilly day in mid-October, the BugLady shared the bench on the hawk tower with this harmless, female PIGEON HORNTAIL/PIGEON TREMEX.  Pigeon horntails are primitive, non-stinging wasps that lay their eggs under the bark of dead/dying trees, and their larvae develop in/eat the wood.  She inoculates the wood with a white rot fungus when she oviposits, to soften the wood of the edible walls of her offspring’s chamber. That spine at the rear is her ovipositor (the horn for which she is named is the smaller point on top).  Alas – pressure-treated lumber – no joy – but together they counted 76 raptors that day!

The BugLady loves the “knock-your-socks-off” color combinations of mid-summer, often involving the radiant GREAT SPANGLED FRITILLARY.  This one is on Joe-Pye Weed.

Isn’t this DARK FISHING SPIDER a beauty!  And no shrinking violet.  A female’s leg-span may measure three to four inches, so they get people’s attention when they wander into the house (our DNR even issued an FYI in the form of a “warning” a few years ago when Dark Fishing spiders were especially numerous, which the BugLady suspects alarmed more people than it calmed).  Fishing spiders are in the nursery web spider family – they spin a sac for their eggs, use their mouthparts to carry it around until the eggs are close to hatching (and so cannot eat for that duration), and then attach it to a plant with (yes) a nursery web.  She stands guard over it until the spiderlings hatch and finally leave the case.  Dark fishing spiders are mostly found around water –  they walk on water, swim under water, leave scent trails across the water’s surface, and chow down on aquatic invertebrates and the occasional small fish or tadpole (https://uwm.edu/field-station/dark-fishing-spider/).

BLACK-AND-YELLOW MUD DAUBERS are solitary wasps that build and provision mud chambers for their eggs.  One source says that it takes thirty to forty trips to a mud source for her to construct just one cell, and she often packs multiple cells against each other in random blob https://bugguide.net/node/view/1480753/bgimage.  She may stash as many as 30 spiders into a cell before deciding that it’s ready for an egg – in behalf of her offspring she collects protein, but she herself feeds on nectar.  Solitary wasps are generally not aggressive, having neither hearth nor home to protect.  For more information, the BugLady is always happy to recommend the original Bug of the Week http://bugoftheweek.com/blog/2017/8/8/where-have-all-the-spiders-gone-black-and-yellow-mud-dauber-wasps-isceliphron-caementariumi-1.

The BugLady likes weevils – there’s something about the cut of their tiny jibs – and she always enjoys seeing this sparkly GREEN IMMIGRANT LEAF BEETLE (either Polydrus sericus/formosus or Polydrus impressifrons – they’re pretty similar).  These particular immigrants came over on the boat in the very early 1900’s.  Adult Green immigrant leaf beetles feed on leaves, and their larvae eat roots, but there are rarely enough of them around to be a problem.

SLUGFEST – The BugLady observed these slugs digging into a tasty fungus toward the end of summer.  Here are some (but not all) Fun Facts About Slugs gathered from a bunch of sources, sacred and profane: Slugs are hermaphrodites (housing both male and female reproductive organs), so any slug can lay eggs (self-fertilization is possible, but it generally takes two to tango); their body is called a foot; they are almost-shell-less gastropods (in the Phylum Mollusca, related to snails and limpets and more distantly to oysters, clams, cockles and mussels ((alive-alive-o)), octopi, and squid; one set of tentacles on the front of their head is light-sensitive and is tipped with eyes and the other is used to smell; like us, snails are mostly water, and their hygroscopic (water-attracting) mucous protects them from dehydration (among other services); slugs are not poisonous but they may carry parasites; they have a top speed of 0.3km/hour; snails have spiral bodies so they can fit into spiral shells – slugs don’t; the collective noun for slugs is “cornucopia;” slug blood is greenish; a slug has rasping mouthparts complete with approximately 27,000 teeth – more teeth than some sharks, and like sharks, slugs routinely lose and replace their teeth; a container half buried in the ground and half filled with yeast, water, and sugar (similar to beer) can lure slugs in and they will drown, but slugs prefer cheap beer over Oregon’s famed microbrews (compliments of the Oregon State University College of Agricultural Sciences “Slug Portal”); from Great Britain – it’s been estimated that an acre of farmland may support over 250,000 slugs, that the average UK garden has a population of over 20,000 slugs and snails, and that a cubic meter of garden can contain an average of up to 200 slugs; slugs can be active in temperatures as low as 41 degrees but snails can’t; slugs can stretch out to 20 times their resting length – all the better to squeeze through tiny openings; and lots of exotic species of slugs have hitchhiked to America (see previous fact).  And there’s so much more https://agsci.oregonstate.edu/slug-portal/education/q-questions-and-funnies, https://www.uky.edu/Ag/CritterFiles/casefile/slugs/slugs.html, and https://carnegiemnh.org/leaping-slugs-did-that-slug-just-jump/ (and a video, of course).

And a TIGER SWALLOWTAIL in a pear tree.  This spectacular butterfly zipped in on the Black Chokeberry (which is in the same genus as pears) and was gone so fast that the BugLady only got one quick (and slightly out-of-focus) shot.

Ain’t Nature Grand!

Have a great holiday,

Kate Redmond, The BugLady

Bug of the Week archives:
http://uwm.edu/field-station/category/bug-of-the-week/

Howdy, BugFans,

Hairstreaks are spiffy little butterflies that are named for the hair-like markings found on their underwings.  Most have thin, twin tails (sometimes two pairs of tails) on the trailing edge of their hindwings, with bright blue/blue and orange eyespots nearby. Says Clarence Weed, writing about hairstreaks in Butterflies Worth Knowing (1922), “the slender tails, together with the enlargement of wings in back of them give the impression of a false head.  Along with this unusual development of the wing is to be considered the fact that these butterflies nearly always alight head downward so that the false head, furnished with what looks like waving antennae, takes the place that would naturally be occupied by the true head.”  Can you see a “face” here https://bugguide.net/node/view/1727485/bgimage?  Sometimes you see hairstreaks with a chunk of hindwing missing due to a predator thinking it was grabbing the tasty end of the butterfly and getting a less vital part instead.

They’re in the family Lycaenidae, which also includes the Blues/Azures, Coppers, and Harvesters, and they’re in the hairstreak subfamily Theclinae.  These are not big, charismatic butterflies – Wisconsin species tend to be on the quietly-elegant side – but there are brightly-colored species in and near the tropics.  Here’s a brief tour of some hairstreak species: https://bugguide.net/node/view/1753150, https://bugguide.net/node/view/1856226/bgpage,

https://bugguide.net/node/view/1463952/bgimage, https://bugguide.net/node/view/1965965/bgimage, https://bugguide.net/node/view/1053259/bgpage, https://bugguide.net/node/view/1561956/bgimage, https://bugguide.net/node/view/535699/bgpage, https://bugguide.net/node/view/788479/bgimage, https://bugguide.net/node/view/1713841/bgpage.

The more commonly seen Wisconsin hairstreaks are those that frequent bright flowers (especially butterfly weed) on sunny landscapes, and it’s not uncommon to find several species on one plant.  But some of our species, including the Striped Hairstreak, are also found in the shade.

Look for Striped Hairstreaks (Satyrium liparops) around woody and swampy openings and edges and in grasslands from the Rockies to the Atlantic (including southern Canada).  There are more of them the farther east you get.  Although they are found over more than half of the continent, they’re never common within that range.  “Scattered lightly over the landscape,” say the folks at the excellent Butterflies of Massachusetts website, “widely distributed although nowhere abundant.”  They speculate that Striped Hairstreaks may have benefitted, at least initially, from the clearing of Eastern forests for agriculture in the 1600’s.

These are small butterflies – 1” to 1 ½” – with a long and a short set of tails, and brown upper wings https://bugguide.net/node/view/239864/bgimage (pictures of hairstreaks with their wings spread are hard to get), and their underwings have a scattering of wide, slightly darker bands that are bordered by parenthesis-like white stripes.  The Edwards and the Hickory Hairstreaks have similar markings, so check your field guide.

They’re out and about in mid-summer.  Males scan the landscape for females from perches in the vegetation, and if they see a rival, will battle by flying around each other in an upward spiral.

[Quick aside.  When the BugLady was in grad school, her minor, briefly, was Ethology – Animal Behavior.  In one lecture, the professor was describing bloodless standoffs between two male fish that puff up and flare their fins at each other.  And the BugLady wondered – if you’ve never seen yourself in the mirror, and you (presumably) don’t have a sense of self-awareness, how do you know if your rival is bigger/tougher than you are, and you’d better back off?  Is life one big game of chicken?]

Anyway, females lay eggs, one by one, on the twigs of the caterpillar host trees, which include some species in the rose family like apple, hawthorn, Juneberry, and cherry, plus some species in the heath family (blueberry) plus a few others.  The eggs overwinter, and when they hatch the next spring, the caterpillars https://bugguide.net/node/view/656623/bgimage selectively eat the buds and flowers first (they are anthophagous), and then the tender leaves and fruit.  That sounds dire, but there are too few of them to cause real damage, and there’s only one brood per year.

Adults feed on nectar from wildflowers and from the flowers of shrubs like staghorn sumac, viburnum, and meadowsweet, and from chinquapin oak.  Butterflies of the Great Lakes Region tells us that “Early in the morning, they [adults] will sip dew from leaves as they bask,” and also that “The males perch low to the ground and are more sedentary and less interactive than the males of many hairstreak species. Adults spend a good deal of time walking on foliage and other perches rather than flying from place to place.  On cool mornings, basking males may find curled leaves at the tops of small bushes…and lie nearly flat against the interior leaf surface with closed wings held nearly perpendicular to the sunlight.  Here they absorb the maximal amount of solar radiation as well as energy from the leaf surface by radiation and conduction.  This allows them to warm up quickly and defend their territory from other males…”

Kate Redmond, The BugLady

P.S.

BugFan Molly shared this link with the BugLady recently https://www.thecaterpillarlab.org/.  The BugLady knows nothing about it, and she is not on its board of directors.  But – great pictures, and check out the store!

Bug of the Week archives:
http://uwm.edu/field-station/category/bug-of-the-week/

Howdy BugFans,

Full disclosure: the BugLady’s copy of Bob Dubois’s Damselflies of the North Woods (aka The Bible) automatically falls open to the page that shows the rear ends of the male Spreadwings.

So – what’s a Spreadwing damselfly? The order Odonata has two sub-orders – Anisoptera (dragonflies) and Zygoptera (damselflies).  Damselflies are further divided into the Broad-winged damsels (jewelwings and rubyspots), the Narrow-winged damsels (bluets, dancers, forktails, sprites, and more), the Spreadwings (family Lestidae), and a few other small groups.  “Spreadwing” describes how they perch – with their wings positioned in a backward-trailing “V.”  Usually.  Unless it’s cold and rainy or it’s a teneral (newly-emerged).

Spreadwings are large for damselflies (1.5” to 2”) and are not particularly brightly-colored.  Males have intense blue eyes and females’ eyes are pale blue or brown.  Sources agree that both male and female spreadwings can be tricky to ID – definitive identification requires examination of the damselfly’s nether regions with a microscope or hand lens, and in the field, females are best known by the company they keep.  Male Southern Spreadwings (https://bugguide.net/node/view/43409/bgimage) look a lot like male Northern Spreadwings https://bugguide.net/node/view/820173/bgimage, which look a lot like male Sweetflag Spreadwings (https://bugguide.net/node/view/477197/bgpage).  Photographers, alas, want labels for our pictures, and we sometimes take leaps of faith.

They aren’t strong flyers, and when they perch, it’s often at about a 45 degree angle, not quite as close to the ground as the sprites and bluets often perch.  They’re found near still waters with lots of vegetation, preferably with no predatory fish – the ideal habitats for their aquatic offspring.  A few live in streams or rivers with a very slow current, and some species are adapted for life in an ephemeral or temporary pond.

Male spreadwings hang out in the vegetation along the shoreline, but females stay away from the water until they are ready to reproduce.  Females lay eggs in plant stems above the waterline, sometimes alone https://bugguide.net/node/view/36973/bgimage, but generally in tandem with a male https://bugguide.net/node/view/1555986/bgimage (he’s guarding his genetic investment).  A few spreadwing species follow the general Odonate formula of hatching quickly, feeding, and then spending the winter underwater as a small, partly-grown naiad (immature).  Other species of spreadwings, the Southern Spreadwing among them, overwinter as eggs and push the restart button in spring.

Bob DuBois, in Damselflies of the North Woods describes their egg-laying practices this way, “This egg-wintering strategy allows them to utilize temporary ponds and vernal ponds that dry up during the summer or fall, because the eggs do not need to be wet all the time….The eggs immediately take some of the initial developing steps, but before hatching occurs they slip into a state of embryonic diapause (rest).  In this state, the drying-resistant eggs spend the winter inside plant stems where they withstand temperatures as cold as it gets in our region ….… after the snows melt and water levels rise in the spring, the dead plant is wetted, providing the moisture needed along with the right increasing temperatures and day-length cues to complete the hatching process. ….. The nymph stage is short for these egg-diapausing species – just two or three months in spring and early summer – because the fast-growing nymphs need to complete their development of about ten instars and emerge before the temporary ponds they live in dry up.”

The biography of SOUTHERN SPREADWINGS (Lestes australis) is similar to that of other spreadwings.  Adults are found on the shorelines of quiet, weedy ponds and marshes.  They’re the earliest Lestes species on the landscape, and they have a very short flight period, appearing in May and fading before the end of June.  Adults eat small insects that they snag in the air, and naiads feed on the tiny aquatic invertebrates that they swim around with.

One of the reasons that Southern Spreadwings are so hard to distinguish from Northern Spreadwings is that they both used to be subspecies of the same species, the Common Spreadwing, and therein lies what Paul Harvey used to call “The rest of the story.”  Any birder can tell you of the joys of “lumping” and “splitting,” in which the Powers That Be split a species, creating another potential check-off for your life list, or lump two or three species, lowering your total (brace yourself birders – the Red Crossbills are about to explode).

Anyway, the Common Spreadwing was split.  Says Paulson of the Southern Spreadwing, in Dragonflies and Damselflies of the East, “With some structural differences and a somewhat different flight season, it probably deserves its rank as a full species, but genetic differences between the two are less than those between most species of spreadwings.”  To add to the confusion, Southern Spreadwings, whose historical range as a subspecies is south of Wisconsin, are moving north.

Scientists and citizen scientists are scrambling to define the edges of the range of the two species.  It may be impossible to know which of the early/pre-split Common Spreadwing records were the (now) Northern or the (now) Southern species, especially where the ranges of the subspecies overlapped.  Bugguide.net plots its range maps based on photos submitted by its members, and although they’re here, Wisconsin is not included on the Southern Spreadwing’s map yet.

Do Southern Spreadwings have resident populations here in Wisconsin or do they just migrate here?  DuBois says “It is not known if this species breeds successfully in our region, or if adults seen here move up from the south.”  They’ve been recorded in 13 Wisconsin counties https://wiatri.net/inventory/odonata/speciesaccounts/SpeciesDetail.cfm?TaxaID=168, and we know there is breeding activity, but are our winters too cold, for too long, to allow the egg in the stem in the open to make it to spring?

Finally, and at the risk of causing Lestes Overload – also moving into our neighborhoods is the Great Spreadwing (Archilestes grandis), a large (up to 2.4”) species native to the west and south whose range now extends to Massachusetts and Ontario (and includes Wisconsin https://wiatri.net/inventory/odonata/speciesaccounts/SpeciesDetail.cfm?TaxaID=126.  The range expansion may be due to climate change, or it may be explained by a proliferation of ditches and farm ponds (the naiad is tolerant of pollution) that allowed the species to hop-scotch across the continent.  Keep your eyes peeled.

The BugLady recommends this lovely offering from Chicago’s Field Museum of Natural History: https://fieldguides.fieldmuseum.org/sites/default/files/rapid-color-guides-pdfs/388_0.pdf

Also – many thanks to BugFan Freda, whose pictures of the Southern Spreadwing are far better than the BugLady’s.

Think damselflies.

Kate Redmond, The BugLady

Bug of the Week archives:
http://uwm.edu/field-station/category/bug-of-the-week/