Ant-decapitating Fly vs Large Yellow-faced Bee

Side-by-side species comparison

Attribute Ant-decapitating Fly Large Yellow-faced Bee
Scientific Name Pseudacteon tricuspis Hylaeus signatus
Order Diptera Hymenoptera
Family Phoridae Colletidae
Size 1-2 mm 7-9 mm
Habitat Farmland Farmland
Diet Parasitoids Nectar Feeders
Regions South America, introduced to North America for biocontrol Europe
Conservation Least Concern Least Concern

Ant-decapitating Fly

A minute parasitoid fly that targets fire ants by injecting eggs into their bodies. The developing larva migrates to the ant's head, eventually causing it to fall off.

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Did You Know?

The larva releases enzymes that dissolve the ant's head contents, and the head eventually falls off to serve as a pupation chamber.

Large Yellow-faced Bee

One of the larger masked bees in Europe with prominent yellow face patches. It is a specialist on wild mignonette and reseda flowers.

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Did You Know?

It depends on brownfield and wasteland habitats that are often viewed as ugly but actually support a rich bee diversity.