There are 20 or so Aeshna darners in North America. The Green-striped Darner (Aeshna verticalis) is a Northeastern darner, found from Minnesota/northern Iowa/southern Canada to Nova Scotia to New Jersey; it is rarely found south of Ohio. Its life story is similar to that of other mosaics.
Curved-Toothed Geometer, Large Maple Spanworm, and Yellow Slant-Line moths are featured in this week Bug of the Week. The three members are in the Family Geometridae, with with 35,000 species worldwide (1,400-plus in North America).
Ostracods are tiny, aquatic critters, critters that you would never expect to contribute significantly to the fossil record, in fact managed to produce the most numerous fossils of all arthropods. Of all arthropods—that’s insects, spiders, centipedes, millipedes, and crustaceans. There are 8,000 to 13,000 total living species, 2,000 of which are non-marine (non-salt water), with 420 of those non-marine species being found in North America.
Time to celebrate three more unsung bugs—bugs about whom little is written and whose internet presence is mostly limited to species/collection/biodiversity lists, and to whom we will give their 15 minutes of fame. Remember—there are more than 100,000 species of insects on this continent north of the Rio Grande, many that are difficult to distinguish from their close relatives and that are lacking both common names and biographies.
Wisconsin has two common species of dark swallowtails—the Black Swallowtail and the dark morph female Eastern Tiger Swallowtail—and we host two dark species that are uncommon strays, the Pipevine and the Spicebush Swallowtail. The latter two are drifters whose caterpillar food plants are not native to Wisconsin. The natural habitats for this lovely wanderer include fields, parks, gardens, dappled woods, and edges from Central America through the southern U.S.
A common prairie resident in late summer is a large, noisy, skittish Tachinid fly with a bristly, bulbous, shiny black abdomen; the BugLady wrote about them in BOTW’s infancy in 2008. Tachinidae is considered the second largest fly family (after the crane flies), and it’s suspected that once all the undiscovered species of Tachinids have been described and welcomed into the fold, it may become the largest fly family.
Three moths, Corn Earworms, Tomato Hornworm and the Squash-Borer, applaud our gardening efforts (alas, the chief contenders for the BugLady’s patio tomatoes are chipmunks, not bugs). Those who don’t want to share can find a lot of information about pest control on-line and at your local Agricultural Extension office.
These thorn-mimicking Two-marked Treehoppers communicate with their prospective mates vocally. Both nymphal and adults tap into the stems of woody and herbaceous plants with their beaks and feed on the sap, and treehopper species are often closely associated with a single food source.
It’s time again for the Annual “Twelve Bugs of Christmas” event (and, coincidentally, episode #350 in the series, by the BugLady’s numbering). Here are a (Baker’s) dozen insects that will not be getting (or who have already had) their own BOTWs. Feel free to hum along, and have a lovely Holiday.
Beautiful caterpillars that grow up to be admirable-looking adults (none of which the BugLady has seen, unless she has a picture of the Lithacodia somewhere in her X-Files). All three of these species have similar ranges east of the Rockies, and the adults of all three can be seen in mid-summer through fall.