Gyas Beetle vs White Underwing

Side-by-side species comparison

Attribute Gyas Beetle White Underwing
Scientific Name Dynastes gyas Catocala relicta
Order Coleoptera Lepidoptera
Family Dynastinae Erebidae
Size 50-110 mm 70-85 mm wingspan
Habitat Forests Woodlands
Diet Sap Feeders Sap Feeders
Regions Brazil Northern United States and southern Canada
Conservation Not Evaluated Least Concern

Gyas Beetle

A large South American relative of the Hercules beetle with shorter, thicker horns. Body is dark brown to black.

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Did You Know?

Unlike the Hercules beetle, their elytra remain dark and do not change color with humidity.

White Underwing

A striking underwing moth with white and black banded forewings that mimics birch bark. Its hindwings are black with broad white bands.

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Did You Know?

It is one of the only underwing moths with white rather than colored hindwings, matching the white bark of its birch tree hosts.