Either of two small insects that appear on or near snow in northern regions or on mountains:
- A small flightless scorpion fly which feeds on mosses (family Boreidae, including the Eurasian Boreus hyemalis); North American name: snow scorpion fly. A springtail that often swarms on snow, making it appear black (family Isotomidae, including the Alpine Isotoma saltans and the North American Hypogastrura nivicola).
- The scientists isolated the gene for green opsins from 11 species of scorpionflies, snow fleas, and true fleas.
- Scientists have discovered new secrets from a tiny snow flea that can survive in freezing conditions.
- Some people become worried by the vast numbers of snow fleas and their sudden appearance on the ground.
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