Share this postNaturalist with NumbersRobber FlyCopy linkFacebookEmailNotesMoreRobber FlyA voracious predatorMike BucklandOct 10, 20201Share this postNaturalist with NumbersRobber FlyCopy linkFacebookEmailNotesMoreShareAmbush hunters. Frequently land on the back of a dragonfly and pierce the thorax with their sharp mouthparts. They can carry a much larger insect away to feed upon.