Are robber flies rare?

There are thousands of species of flies in North America. <b>Robber flies are not uncommon</b>. On Oct 3, 2016

Question

There are thousands of species of flies in North America. Robber flies are not uncommon. On Oct 3, 2016

Hagrid P Hazard · Accepted Answer

There are thousands of species of flies in North America. Robber flies are not uncommon. On Oct 3, 2016