Chicken feathers come in an astonishing range of colors and patterns, which help to make each breed recognizable. (An excerpt from "The Illustrated Guide to Chickens")
All About Chicken Feathers - Tilly's Nest
Valorisation of chicken feathers: Characterisation of chemical
Birds: Several guides offer help with identifying all the
Species Identification (PDF) - Port of San Francisco
Chicken Feathers Guide
Golden Sebright Bantam Chicken Feathers
Feathers: The Evolution of a Natural Miracle 1, Hanson, Thor
Types of feathers Contour feathers, Types of feathers, Feather
Chicken Feathers Guide