Large-headed Resin Bee vs Spanish Fly

Side-by-side species comparison

Attribute Large-headed Resin Bee Spanish Fly
Scientific Name Heriades truncorum Lytta vesicatoria
Order Hymenoptera Coleoptera
Family Megachilidae Meloidae
Size 6-8 mm 10-22mm
Habitat Orchards Orchards
Diet Nectar Feeders Herbivores
Regions Europe, Western Asia Europe, Asia
Conservation Least Concern Least Concern

Large-headed Resin Bee

A tiny black resin bee with a disproportionately large head that nests in beetle holes and hollow stems. It uses plant resin to construct partitions between brood cells.

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Did You Know?

Its oversized head allows it to perfectly plug the entrance of its narrow nest cavity like a living door.

Spanish Fly

A slender, metallic green blister beetle with soft elytra. It produces cantharidin, a potent blistering agent, as a chemical defense.

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Did You Know?

Cantharidin from this beetle has been used in medicine for centuries but it is extremely toxic and can be lethal if ingested.