Colors and shapes of birds are variable, but the arrangement of feathers or feather areas on a bird’s body is remarkably similar across all species
Anatomy: Parts of a Feather
Buena Vista, Pocahontas, Guthrie counties report bird flu in Iowa
People report dozens of local birds sick from avian flu, News
Diverse mechanisms of gloss production in birds. Feather cartoons
Frontiers Cortex Thickness Is Key for the Colors of Iridescent Starling Feather Barbules With a Single, Organized Melanosome Layer
Field Ornithology - American Birding Association
Holiday on the wing: It's time to look, listen and crunch the avian numbers
Everything You Need To Know About Feathers
Structure of a typical contour feather showing the rachis with vanes on
Birds of a feather display only a fraction of possible colours
The evolutionary origin of avian facial bristles and the likely role of rictal bristles in feeding ecology
Parts of a Bird: Feather Areas - Avian Report
Feather, Flight, Structure, Function
Feather Anatomy: Labels and Location Diagram