The world is full of robber flies—approximately 7,000 species have been recognized worldwide and 1,000 are native to North America A robber fly perched on a flat piece of sandstone in the red rock ...

The eyes are falsely colored and the head sizes are not to scale — in reality, the dragonfly dwarfs the other two species in size. This slide shows one of the eyes of the robber fly Holcocephala ...

The robber fly Holcocephala is a relatively small fly - at 6mm in length, it is similar in size of the average mosquito. Yet it has the ability to spot and catch prey more than half a metre away ...

When the saffron robber flies were shown an LED light flashing at various frequencies, they only took off after the ones that flashed at the same frequency as beetle wings. "This species ...

The mid-air hunting strategy of a tiny fly the size of a grain of rice has been revealed by an international team of scientists. Holcocephala, a species of robber fly, is able to intercept and ...

These robber flies are entomological warriors ... Although there are 22 species in the U.S., only two are regularly encountered in Ohio. To most people, a cannibal fly would look quite creepy.

Robber flies have been seen snatching a spider ... Not so for the Microphorus crassipes. This fly species sees a spider's larder as a golden opportunity. Indeed, it gets most of its food by ...

Some species require a butterfly lover (aka lepidopterist ... We saw small beetles and elegant solitary wasps on blooming wildflowers. A robber fly, a member of a family known as assassin flies ...

This fly species sees a spider's larder as a golden ... Another type of fly found worldwide, called Robber Flies, take this thieving concept one step further. Instead of just stealing the ...