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covert feather
/koʊvˈɜːt fˈɛðɚ/
/kəʊvˈɜːt fˈɛðə/
Covert feather
01
piuma coprente, piuma tectrice
a type of small, fluffy feather that covers the base of a bird's larger flight feathers, providing insulation and helping to streamline the bird's wing shape
