Ant-decapitating Fly vs Gulf Fritillary

Side-by-side species comparison

Attribute Ant-decapitating Fly Gulf Fritillary
Scientific Name Pseudacteon tricuspis Dione vanillae
Order Diptera Lepidoptera
Family Phoridae Nymphalidae
Size 1-2 mm 60-95 mm wingspan
Habitat Farmland Farmland
Diet Parasitoids Nectar Feeders
Regions South America, introduced to North America for biocontrol North America, Central America, South America
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.

Gulf Fritillary

Bright orange wings with black markings above and elongated silver spots below. Despite its name, it belongs to the passion-vine butterfly subfamily.

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Did You Know?

Caterpillars are bright orange with black spines to warn predators of chemicals from passion vines.