Big Dipper Firefly vs Spiny Oak Slug Moth

Side-by-side species comparison

Attribute Big Dipper Firefly Spiny Oak Slug Moth
Scientific Name Photinus consimilis Euclea delphinii
Order Coleoptera Lepidoptera
Family Lampyridae Limacodidae
Size 8-12 mm 22-30 mm wingspan
Habitat Woodlands Orchards
Diet Omnivores Omnivores
Regions North America Eastern North America
Conservation Least Concern Least Concern

Big Dipper Firefly

A common North American firefly that produces a slow, arching flash resembling the Big Dipper constellation pattern. It is active in early summer evenings.

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Did You Know?

Each species of Photinus has evolved its own unique flash pattern to avoid mating with the wrong species.

Spiny Oak Slug Moth

A small colorful moth with green, brown, and silver-spotted forewings. Its flattened, jewel-like caterpillar is green with red and yellow markings and bears stinging spines.

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Did You Know?

The ornate caterpillar has been called one of the most beautiful in North America despite its painful sting.