Glacier Black Fly vs Sand Martin Flea

Side-by-side species comparison

Attribute Glacier Black Fly Sand Martin Flea
Scientific Name Prosimulium alpestre Ceratophyllus styx
Order Diptera Siphonaptera
Family Simuliidae Ceratophyllidae
Size 2-4 mm body length 2-3 mm
Habitat Mountains Rivers & Streams
Diet Blood Feeders Blood Feeders
Regions Alps, Northern Europe Europe, Western Asia
Conservation Least Concern Least Concern

Glacier Black Fly

A small black fly whose larvae develop in fast-flowing alpine streams. Adults are among the earliest insects active after snowmelt.

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Did You Know?

Larvae anchor themselves to rocks in torrential currents using silk pads and tiny hooks.

Sand Martin Flea

A flea species specific to sand martin colonies in their bank-nesting burrows. It can accumulate in large numbers in nest chambers.

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Did You Know?

Colony-nesting birds like sand martins provide an ideal environment for flea population explosions in shared burrows.