Its long dagger ... feather, rather than the barbules, or minute filaments fringing a feather. Since the fluffy barbules on cassowary feathers are pretty sparse, the rachis gets more exposure to ...

When white light strikes a blue feather, the keratin pattern causes red and yellow wavelengths to cancel each other out, while blue wavelengths of light reinforce and amplify one another and ...

The brilliant blue patterns on the tail and the blue in its chest is just light being used to fool your eye. Think of the feather like a prism that refracts light. “They call it a structural ...

Its long dagger ... feather, rather than the barbules, or minute filaments fringing a feather. Since the fluffy barbules on cassowary feathers are pretty sparse, the rachis gets more exposure to ...