Wasp Twisted-Wing Parasite vs American Wasp Xenid

Side-by-side species comparison

Attribute Wasp Twisted-Wing Parasite American Wasp Xenid
Scientific Name Xenos vesparum Xenos peckii
Order Strepsiptera Strepsiptera
Family Xenidae Xenidae
Size 2-5 mm (males) 3.0-5.0 mm (males)
Habitat Woodlands Woodlands
Diet Parasites Parasites
Regions Europe North America
Conservation Least Concern Not Evaluated

Wasp Twisted-Wing Parasite

An endoparasite of paper wasps where females spend their entire life inside the wasp host. Parasitized wasps are castrated and abandon their colony duties.

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Did You Know?

Female Xenos never leave their wasp host — they live, mate, and give birth to thousands of larvae while permanently embedded in the wasps abdomen.

American Wasp Xenid

A parasite of paper wasps in eastern North America, commonly found in Polistes fuscatus colonies. It dramatically alters host wasp behavior.

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Did You Know?

Up to 40% of paper wasps in some colonies can be parasitized by this twisted-wing parasite.