What is this close-up picture? (WotsThat: White feather texture (macro))

Question

What object is shown in this zoomed-in close-up photo?

BogIron · Accepted Answer

White feather texture (macro). White feathers reflect all wavelengths of light instead of absorbing them, and pure white birds like swans often spend extra energy keeping that colour clean since it shows dirt more easily than darker plumage.

Answer: White feather texture (macro)

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