Southern Flannel Moth vs Mountain Long-legged Fly

Side-by-side species comparison

Attribute Southern Flannel Moth Mountain Long-legged Fly
Scientific Name Megalopyge opercularis Dolichopus alpinus
Order Lepidoptera Diptera
Family Megalopygidae Dolichopodidae
Size 25-36 mm wingspan 4-6 mm body length
Habitat Woodlands Meadows
Diet Omnivores Omnivores
Regions Southeastern United States, Central America Alps, Central European mountains
Conservation Least Concern Least Concern

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.

Mountain Long-legged Fly

A metallic green fly with long legs found in damp alpine meadows. Males perform elaborate courtship displays using their ornamental leg scales.

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Did You Know?

Males wave their decorated legs like flags during courtship to impress females.