Retrieving "Ultraviolet Degradation" from the archives

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1. Feathers

   Linked via "ultraviolet degradation"

   Feather Replacement (Molting)
   Feathers?) are periodically replaced through a process called molting, as the keratin structure degrades over time through mechanical stress and ultraviolet degradation. Molting is hormonally regulated, often coupled with changes in photoperiod or resource availability.
   In many passerines, [molting](/entries/molting…