Definition of stonefly in English:

stonefly

Syllabification: stone·fly
Pronunciation: /ˈstōnˌflī
 
/

noun (plural stoneflies)

A slender insect with transparent membranous wings, the larvae of which live in clean running water. The adults are used as bait by fly fishermen.
  • Order Plecoptera: many families
More example sentences
  • Young Atlantic salmon in streams eat mainly the larvae of aquatic insects such as blackflies, stoneflies, caddisflies, and chironomids.
  • The Permian saw the appearance of stoneflies, true bugs, beetles, and caddisflies, among other groups.
  • Their findings can then be presented to government scientists for further investigation, or passed to national recording schemes for the three main groups of river insects: caddisflies, mayflies, and stoneflies.

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