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#Tachinidae

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Stefan F. Wirth

The fly #Ectophasia #crassipennis (#Phasiinae, #Tachinidae,) has a Palearctic distribution and prefers #warmth. In Germany, warmth-favored areas are populated. Contrary to older literature referring to southern/southwest #Germany, the species also occurs in #Berlin. The #brood lives endoparasitically in #truebugs, often on #Pentatomidae. #Globalwarming favors the expansion of the original distribution of #warmthloving#species. #Biodiversity
© #StefanFWirth Berlin 2024
(#photos my © 2020-24)

Public
neville park

Happy #FridayFlyday! I was astonished to see this ENORMOUS, ferociously bristled fly, the size of a bumblebee, visiting the garden goldenrod. I had no idea flies could get this big, at least not here.

It stared me down when my picture-taking annoyed it. I backed off, as I figured the beast could give me a concussion if it flew into my head with enough force.

Click for bristle butt and intimidating eye contact

#FlyFriday #bugstodon #insects #flies • #Diptera #Tachinidae

Public
Bryan Wright

A fly I haven't seen before (possibly Hemyda aurata?) This poor guy was missing its left hind leg. The whole time I was there, the fly kept jabbing its abdomen at the leaf. A female depositing eggs? A confused male? I would have guessed that those naughty bits are some kind of clampy thing that belongs to a male.

A yellow, orange, and dark brown insect stands near the edge of a serrated green leaf. We see the insect from his right side. He has a shape reminiscent of a wasp, but we see his bright yellow haltere, the vestige of his lost second pair of wings, telling us that he's a fly. Above the haltere is a little yellow tent, a calypter, like a hand cupped palm-downward. The wings are swept back and lifted at a slight angle. The abdomen starts with a couple of translucent yellow sections near the thorax, then turns dark brown. It tapers toward the end, where we see some complicated protrusions (genitalia, or related structures used in mating?) These are lowered, touching the leaf. His head is large, and almost entirely covered by large, dark compound eyes. The antennae are like billy clubs pointing forward, each with a fine hair of an arista poking up and forward.
#fly#flies#tachinidae
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Albert Cardona

Flies galore, of the parasitoid kind:

Tachinid fly, Gymnostoma rotundanum inaturalist.org/observations/1 . The #Tachinidae lay eggs on the surface of their host—often other insects—with such strong glue that removing the egg would kill the host. Often even drop larvae directly on the hosts.

Thick-headed fly, Physocephala visatta inaturalist.org/observations/1 The #Conopidae are internal parasites of bees and wasps—intercepting them in mid flight, the female’s abdomen has a “can opener” to insert an egg between the abdominal tergites of the host.

Beefly, Lasiopa sp. inaturalist.org/observations/1 The #Bombylidae drop their eggs while in flight near the entrance of solitary bee nests. The larvae crawl in and take over the bee’s resources of nectar and pollen, either starving or directly eating the bee larva.

All the adults happily sip nectar; the larvae, meanwhile, rival parasitoid wasps in their lifestyle and effectiveness.

#iNaturalist#entomology#insects
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