A female northeastern hammertail, a species of robber fly (Efferia aestuans), waits to ambush insect prey. The female of this ...

Corrections A previous version of this story said a rubber fly was found during the Ojibway Prairie BioBlitz. In fact, it was a robber fly. Jul 20, 2015 6:50 AM PDT ...

The new species each specialize in parasitizing one species of fly found in forests throughout Thailand, according to a study. Photos by Mongkolsamrit S, Thanakitpipattana D, Noisripoom W ...