Dancing Fly

A tiny fly dances at the edge of a peony leaf–an obvious visual display.

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I have seen this species of fly before–it is a black scavenger fly, possibly in the genus Sepsis.

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From the condition of its abdomen I think it might be a gravid female.  But why would a gravid female dance like this?  It would seem to be some kind of mating dance.  It doesn’t make sense.

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Then it moved to the flower bud and continued to dance, stopping briefly to sop up some liquid.

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About the roused bear

Nature photographer from central Iowa.
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