If you've spotted a yellow house finch, you might wonder if it's rare — and what caused the yellow coloration. Here's what ...

Carotenoids are the underlying pigment for much of the enormous variety in color found across birds and form the basis for the colors red, yellow, and orange. In a study published in Current Biology, ...

Quiz question: Name a bright yellow bird, one that seems invariably chipper, has an unusual diet, moves around in flocks of its own kind and lives among us in disguise all winter. If “male American ...