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Plumulaceous (downy) regions of a contour feather. Basal plumulaceous

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Feather Basics – HollandWest

Everything You Need To Know About Feathers

Glossary of Bird Terms

Features of a Feather Flashcards

Down Feather Structure Varies Between High and Low Elevation Male Andean Torrent Ducks (Merganetta Armata)

The Secret of Bird Feathers - What's a Feather Look Like Under a Microscope? - Rs' Science

Integument SpringerLink

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DIFFERENCES IN PLUMULACEOUS FEATHER CHARACTERS OF DABBLING AND DIVING DUCKS

Integument SpringerLink

Ana AGREDA, Program Manager, Master of Science

Ana AGREDA, Program Manager, Master of Science

Down Feather Structure Varies Between High and Low Elevation Male Andean Torrent Ducks (Merganetta Armata)