Yellow Swarming Fly vs Giant Crane Fly

Side-by-side species comparison

Attribute Yellow Swarming Fly Giant Crane Fly
Scientific Name Thaumatomyia notata Tipula maxima
Order Diptera Diptera
Family Chloropidae Tipulidae
Size 2-2.5 mm 30-40 mm body length, wingspan up to 65 mm
Habitat Grasslands Rivers & Streams
Diet Predators Detritivores
Regions Europe Europe
Conservation Least Concern Least Concern

Yellow Swarming Fly

A tiny yellow fly famous for forming enormous hibernation aggregations in buildings, sometimes numbering millions. Larvae are predatory on root aphids in grassland.

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Did You Know?

Can form hibernation clusters of millions in attic spaces, with individual aggregations weighing several kilograms.

Giant Crane Fly

The largest European crane fly, with marbled wings spanning up to 65 mm. Larvae develop in wet leaf litter along stream banks and shaded ravines.

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Did You Know?

With a wingspan approaching 65 mm, it is often mistaken for a giant mosquito but is entirely harmless.