The key genes change the chemical structure of the pigment molecule through the actions of an enzyme which adds just one atom ...

Nearly all birds with bright red, orange, and yellow feathers or bills use a group of pigments called carotenoids to produce ...

From the Carnival in Rio de Janeiro to the shoulders of pirates: parrots are synonymous with colour for people across the ...

The migratory pattern of the scarlet tanager typically involves a straight line from as far north as Maine to as far south as ...

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Australian finches' bill colors come from small genetic variations affecting how they process dietary pigments.