Hover flies have one set of wings and no stinger. If you've been outside lately, chances are you've seen them — small flying insects that resemble sweat bees. In fact, you may have actually called ...
It takes Mandela Fernández-Grandon 15 minutes to train a hoverfly, a harmless wasp look-alike. The entomologist at the University of Greenwich, UK, immobilises each tiny insect in a cocoon-like holder ...
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