Jul 8, 2012

Curious wasp mimic fly

A curious little fly was searching among the marsh elder leaves. Its front legs had white “feet”, which the fly frequently rubbed producing an eerie resemblance with an ichneumonoid wasps. The body coloring was also similar to its hymenopteran models, and banded wing patterns made the fly appear to have a
narrow wasp-like waist. Very little is known of the biology of Stilt-legged Flies (Micropezidae) other than the larvae are mostly excrement or rotted plant material eaters and that the North American species live near water. These flies are mostly tropical, and not very common further north.

The adult diet is mostly unknown.  Some species have elaborate courtship rituals such as “dancing”, direct feeding of the female, or placement of fluids on the eye of the female to wipe off and consume. This particular species is probably Taeniaptera trivittata.



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