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

Topography of a contour feather with measurement terminology used in

Topography of a contour feather with measurement terminology used in

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

The Feather Atlas - Feather Identification and Scans - U.S. Fish and Wildlife Service Forensics Laboratory

An example of time spent flying per day for an individual Common

PDF] Quantification of microscopic feather characters used in the identification of North American plovers

PDF) Differences in plumulaceous feather characters of dabbling and diving ducks

Molecular and Cellular Mechanisms of Feather Development Provide a Basis for the Diverse Evolution of Feather Forms

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