Ant-decapitating Fly vs Pine Weevil

Side-by-side species comparison

Attribute Ant-decapitating Fly Pine Weevil
Scientific Name Pseudacteon tricuspis Hylobius abietis
Order Diptera Coleoptera
Family Phoridae Curculionidae
Size 1-2 mm 10-14 mm
Habitat Farmland Farmland
Diet Parasitoids Wood Feeders
Regions South America, introduced to North America for biocontrol Europe, Northern Asia
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.

Pine Weevil

A dark brown weevil with patches of golden scales that is a major pest of young conifer plantations. Adults girdle the bark of seedlings, killing them.

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Did You Know?

A single adult can kill multiple young conifer trees in one season by stripping rings of bark from their stems.