covert feather
US /ˈkʌvərt ˈfɛðər/
UK /ˈkʌvərt ˈfɛðər/
1.
pena coberteira
Any of the small feathers covering the bases of the larger flight feathers of a bird's wing or tail.
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The bird's beautiful plumage was highlighted by the iridescent covert feathers.
A bela plumagem do pássaro foi realçada pelas penas coberteiras iridescentes.
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Ornithologists often examine the pattern of covert feathers for species identification.
Ornitólogos frequentemente examinam o padrão das penas coberteiras para identificação de espécies.