Male Painted Bunting in his spectacular plumage : Tim Hopwood Variations in plumage can be based on the sex of the bird, its age, or seasonal changes caused by molting. Molting patterns are complex and even the experts do not have all the answers about how this process is controlled. This basic
Leucistic plumage as a result of progressive greying in a cryptic nocturnal bird
How to Distinguish a Male & Female Robin
Feathers - Biology
All About Birds
Bird Plumage: Patterns & Functions - Avian Report
Birdology Article, Formats
Neossoptile plumage, bird anatomy
How to Distinguish a Male & Female Robin
Plumage Variations - Wild Turkey Lab