Black-Headed Ash Sawfly vs Hispaniolan Swallowtail

Side-by-side species comparison

Attribute	Black-Headed Ash Sawfly	Hispaniolan Swallowtail
Scientific Name	Tethida barda	Papilio aristodemus
Order	Hymenoptera	Lepidoptera
Family	Tenthredinidae	Papilionidae
Size	6-8 mm	90-110 mm wingspan
Habitat	Forests	Forests
Diet	Herbivores	Wood Feeders
Regions	Eastern North America	Hispaniola, Florida Keys, Cuba
Conservation	Least Concern	Endangered

Black-Headed Ash Sawfly

A small sawfly whose larvae have distinctive black heads and whitish-green bodies. They feed on the underside of ash leaflets, skeletonizing them.

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This species is often mistaken for moth caterpillars, but like all sawfly larvae, it has more than five pairs of prolegs on its abdomen.

A large swallowtail butterfly found in the Caribbean with yellow and dark brown wings. Several subspecies are endemic to different islands.

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The Florida Keys subspecies ponceanus is one of the rarest butterflies in the United States.