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Robber Fly (Family: Asilidae) - Wiki
Subject: Robber Fly (Family: Asilidae) - Wiki
Robberfly dec 2006-Robber Fly, Zosteria.jpg
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Robber Fly (Family: Asilidae) - Wiki


Asilidae
From Wikipedia, the free encyclopedia

[Photo] Robberfly (cf. Zosteria spec.). Taken in Swifts Creek, Victoria, Australia in December 2006. Photo by http://en.wikipedia.org/wiki/User:Fir0002
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Flies in the Diptera family Asilidae are commonly known as robber flies. The family Asilidae contains about 7,100 described species worldwide. All robber flies have stout, spiny legs, a dense moustache of bristles on the face (mystax), and 3 simple eyes (ocelli) in a characteristic depression between their two large compound eyes. The mystax helps protect the head and face when the fly encounters prey bent on defense. The antennae are short, 3-segmented, sometimes with a bristle-like structure called an arista. The short, strong proboscis is used to stab and inject victims with saliva containing neurotoxic and proteolytic enzymes which paralyze and digest the insides; the fly then sucks the liquefied meal through the proboscis. Many species have long, tapering abdomens, sometimes with a sword-like ovipositor. Others are fat-bodied bumble bee mimics. Adult robber flies attack other flies, beetles, butterflies and moths, various bees, dragon and damselflies, ichneumon wasps, grasshoppers, and some spiders.

http://en.wikipedia.org/wiki/Asilidae
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