Covert feather

Topside of a chicken wing showing all major feather groups

A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or tectrices), which, as the name implies, cover other feathers. The coverts help to smooth airflow over the wings and tail.

单词	Underwing coverts
释义	Underwing coverts 英语百科 Covert feather A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or tectrices), which, as the name implies, cover other feathers. The coverts help to smooth airflow over the wings and tail.
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Underwing coverts

Covert feather