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756 Views 3 Replies Last post: Jul 17, 2013 11:42 AM by abm RSS
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Jul 16, 2013 2:56 PM

Can someone id this fly?

I have Heriades Truncorum using the 'bee posts' that I have provided. However, not satisfied with the accommodation I have provided, they are tunneling into the sandy mortar of my garage wall.This morning I noticed what I presume are flies, two at a time, shadowing the bees in flight and then standing guard outside the tunnel. They seem malevolent and I think one of the two will enter the tunnel, possibly when the bee departs.

I attach a picture of one of these. It is about the size of a housefly.


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