About Asilus crabroniformis Linnaeus, 1758
The hornet robberfly, scientifically named Asilus crabroniformis, is a predatory insect species belonging to the family Asilidae. It reaches a body length of over 25 mm, making it one of the largest flies found in the United Kingdom. This species feeds on grasshoppers, dung beetles, and other flies. Unlike true hornets, this robberfly has only one yellow patch on its abdomen and only one pair of wings. Its larvae are thought to feed on dung beetle larvae and other detritivores. Asilus crabroniformis inhabits woodland clearings and well-drained areas of heaths and downs across Southern England, and South and West Wales. The species relies on the presence of either rabbit or cattle dung. It is classified in the robberfly family Asilidae, subfamily Asilinae, and is listed as an endangered species in the British Isles.
