Retrieving "Dermal Follicle" from the archives

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1. Feathers

   Linked via "dermal follicle"

   The pigmentation of feathers is governed by two primary mechanisms: melanin-based pigments (eumelanins and phaeomelanins) which confer blacks, greys, and muted reds, and structural color. Structural coloration arises from the micro-architecture of the barbules interacting with incident light. For example, iridescence blues and greens are often caused by regularly spaced keratin nanostructures t…