Hinterland Who's Who - Blue Jay
Plumages, Molts, and Structure - Blue Jay - Cyanocitta cristata - Birds of the World
MI Birds - Did you know that the pigment in Blue Jay
Migratory Birds Have Lighter-Colored Feathers – Here's the Evolutionary Explanation
Structural Color in Birds - Blue Feathers Are Not Blue!
Blue birds Memos from the Field
Why Are Some Feathers Blue?, Science
Untitled, PDF, Bird Migration
Plumages, Molts, and Structure - Blue Jay - Cyanocitta cristata - Birds of the World
For The Birds - 6BC Botanical Garden
Spatially modulated structural colour in bird feathers