Japanese Yellow Swallowtail vs Spotted Willow Leaf Beetle

Side-by-side species comparison

Attribute Japanese Yellow Swallowtail Spotted Willow Leaf Beetle
Scientific Name Papilio machaon hippocrates Chrysomela knabi
Order Lepidoptera Coleoptera
Family Papilionidae Chrysomelidae
Size 70-90 mm wingspan 6-8 mm
Habitat Mountains Mountains
Diet Nectar Feeders Herbivores
Regions East Asia, Japan Western North America
Conservation Least Concern Least Concern

Japanese Yellow Swallowtail

The Japanese subspecies of the Old World swallowtail, known as 'ki-ageha.' A large and elegant butterfly with bright yellow wings marked with black patterns and blue hindwing spots.

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Did You Know?

This butterfly engages in 'hilltopping' behavior, where males fly to hilltops and ridges to establish territories and wait for females.

Spotted Willow Leaf Beetle

A dark metallic blue-black beetle with an oval body found on willows in western North America. Adults and larvae feed on willow foliage near mountain streams.

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Did You Know?

This species is adapted to high-altitude habitats and is commonly found above 2,000 meters elevation in the Rocky Mountains.