alderfly
Pronunciation:
/ˈɔːl.də.flaɪ/noun
Definitions
A member of any one of the sixty-six species of the family Sialidae of megalopteran insects, each specimen of which has a body length not exceeding one inch and possesses long filamentous antennae and four large dark wings.
An artificial fly with brown mottled wings, body of peacock harl, and black legs.