Ant-decapitating Fly vs Heineken Hoverfly

Side-by-side species comparison

Attribute Ant-decapitating Fly Heineken Hoverfly
Scientific Name Pseudacteon tricuspis Rhingia campestris
Order Diptera Diptera
Family Phoridae Syrphidae
Size 1-2 mm 9-12 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.

Heineken Hoverfly

An unmistakable hoverfly with a long, beak-like snout used to reach nectar in tubular flowers. It has an orange abdomen and dark thorax.

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Did You Know?

It is nicknamed the Heineken fly because its long snout lets it reach the nectar other hoverflies cannot reach.