Microcaddisfly vs Yellow-legged Dance Fly

Side-by-side species comparison

Attribute Microcaddisfly Yellow-legged Dance Fly
Scientific Name Hydroptila sparsa Empis livida
Order Trichoptera Diptera
Family Hydroptilidae Empididae
Size 3-4 mm 7-10 mm
Habitat Rivers & Streams Rivers & Streams
Diet Omnivores Nectar Feeders
Regions Europe, North America Europe
Conservation Least Concern Least Concern

Microcaddisfly

One of the smallest caddisflies, with adults only 3-4 mm long. Larvae build tiny purse-shaped cases from silk and algae on submerged rocks.

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Did You Know?

Microcaddisfly larvae build a new case for each instar, and their final pupal case is so small it is barely visible to the naked eye.

Yellow-legged Dance Fly

A medium-sized dance fly with yellowish legs, a grayish body, and a distinctive long proboscis. It forms conspicuous mating swarms near streams and in sheltered clearings.

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Did You Know?

In some dance fly species, males wrap worthless objects in silk to trick females into mating, a form of sexual deception.