yellow dung fly

experimental manipulation eyes distribution yellow ecotoxicological testing small insects human agriculture short lifespan science entomology animal kingdom model organism brightly colored nutrition avermectins endoparasites important biocontrol agents lifecycle insect macro nature fly dung scathophaga stercoraria wild golden scathophagidae diptera musca merdaria zoology close green specie cannibalism fur prey initial interest front legs greenbrown research livestock knowledge biology abundant