northeast-flora-and-fauna

Here's a small fly that's generally considered beneficial, the Margined Calligrapher . (Or maybe I should say  Margined Calligrapher . ) Similar to their Eastern Calligrapher cousins, they are hover flies that mimic bees to appear more dangerous than they actually are. As adults they're harmless pollinators, though in their wild and crazy youth they were known to attack small invertebrates like aphids. Usually the little tip at the end of the abdomen has more black on it. I've read that some relatives will look lighter if it was warm during their pupal stage; perhaps this fella pupated during a warm stretch? June 8, 2022 at Duke Farms Photo 209834396, (c) jpviolette, some rights reserved (CC BY-NC)

Here's a belligerent wasp that you wouldn't want to meet, right? Wrong! This isn't a wasp at all but a non-stinging hoverfly , more precisely the Yellow-spotted Falsehorn. Note that I won't be able to tell you a lot about this fly since it's one of those species (and genii) that doesn't have a lot written about it (at least online). What I can tell you is that, like some other hoverflies like the Eastern Calligrapher and the Transverse-banded Flower Fly , these flies are bee/wasp mimics. In the insect world if you're not going to be dangerous yourself, it pays to at least look dangerous, and these guys do it by looking like someone who could sting you. And like the other hoverflies, as adults they do like their nectar. As kids (larvae) these flies bore into and eat wood, though it sounds like they mostly go after rotting wood/logs; it's unclear that they're much of a threat to healthy trees. The falsehorn flies shouldn't be confused with the ho...

Meet an Eastern Calligrapher , an insect I probably haven't shown you before. (At least I hope it's an Eastern Calligrapher; some of its relatives look similar.) Eastern Calligraphers are part of a very large group of insects sometimes called hover flies (the males will hover around, either defending a territory from other males or just hoping to get the attention of a female), sometimes called flower flies (the adults feed off of the nectar and pollen of flowering plants), and sometimes called  syrphid flies (pronounced SUR-fid, which appears to come from Greek and Latin words loosely meaning "descended from gnats"). These flies have a waspy look, are considered wasp mimics, and since they can't sting, they're a good example of Batesian mimicry . Notice though that as flies, they have only 1 pair of wings whereas wasps, bees, and most flying insects have 2 pairs of wings.  They're considered pollinators , though they're probably not as effective as...