Posted by Nikolay_D on 21-09-2021 07:07
#7
Thanks for the correction of determination!
I looked through the flickr page on Brachypalpus laphriformis. The behavior of this fly imitating Osmia exactly matches what I have witnessed. Frankly speaking, when it was disturbed and started to fly around the trunk, I thought that the fly flew away and a bee just came to investigate. It was only when it settled for the second time that I realized the trick.