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Robberfly - a violent hunter

This is the 19th century sense of a robber, as a bandit who waylays innocent travellers, rather than the modern synonym for a thief. Robber flies don't steal anything, however they will attack almost any insect, including flies, bees and wasps, and even some spiders. They are accomplished acrobatic flyers and often catch their prey on the wing. Once a victim is caught, they inject it with a paralysing neurotoxin that contains enzymes to digest the internal organs, which they suck up by proboscis

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