Southern Flannel Moth vs Brown Hairstreak

Side-by-side species comparison

Attribute Southern Flannel Moth Brown Hairstreak
Scientific Name Megalopyge opercularis Thecla betulae
Order Lepidoptera Lepidoptera
Family Megalopygidae Lycaenidae
Size 25-36 mm wingspan 36-40 mm wingspan
Habitat Woodlands Hedgerows
Diet Omnivores Omnivores
Regions Southeastern United States, Central America Europe, temperate Asia
Conservation Least Concern Least Concern (declining in parts of range)

Southern Flannel Moth

A fluffy moth covered in cream to orange-brown fur-like scales. Its larva, called the puss caterpillar, is covered in soft-looking hair that conceals venomous spines.

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Did You Know?

The puss caterpillar is considered the most venomous caterpillar in North America, with stings requiring medical attention.

Brown Hairstreak

A secretive butterfly with rich brown wings and an orange flash on the female's forewings. Adults spend most of their time in tree canopies, rarely descending to ground level.

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Did You Know?

Eggs are laid singly on blackthorn and are easier to find in winter than the elusive adults are in summer.