Photo 2070991, (c) Mark Rosenstein, some rights reserved (CC BY-NC), uploaded by Mark Rosenstein

Attribution © Mark Rosenstein some rights reserved Uploaded by maractwin Source iNaturalist Associated observations Photos / Sounds What Physocephala tibialis Observer maractwin Date June 30, 2015 01:37 PM EDT Place Middlesex, Massachusetts, United States (Google, OSM) Date Added June 30, 2015 04:33 PM EDT Description What are they doing? If there were two, I'd have a pretty good idea. But three?! Tags belmont, great meadow, thick-headed flies 2 comments 4 IDs Research Grade View Sizes small medium large original