Super-black feathers can absorb virtually every photon of light

Male Birds of Paradise have patches of super-black plumage that absorb 99.95 percent of light. New research identified their feathers’ microscopic structures that make them look so very dark.

Discovering Light, PDF, Electromagnetic Spectrum

weekend open thread - July 31-August 1, 2021 — Ask a Manager

PDF) Development of colour-producing -keratin nanostructures in avian feather barbs

What colours glow in black light and why is it only some colours

One photon is all it takes to kick off photosynthesis

Quantum Optics Galileo Unbound

How Do We See Light?

Ultra-black fish are practically invisible - Scimex

What color is a black light? - Quora

Evolution – News, Research and Analysis – The Conversation – page 25

Feathers – News, Research and Analysis – The Conversation – page 1

Is it true that there are no blue feathers? That they're really black and it's just the way light reflects off them that it appears that they're blue? - Quora

Why is dark blue often confused with black? - Quora