Rosy-finches are known for being fairly hard to spot — but wintertime provides a few more opportunities to catch a glimpse of ...

Told from male Cassin’s finch by brown cap and eyebrow and curved bill. Other tell-tale differences between the species include the Cassin’s pink cheek and pinkish tone on its back ...

Chicks hatch with white feathers that turn gray—and later take their pink color from aqueous bacteria ... them,” says Chris Brown, curator of birds at the Dallas Zoo and Children’s Aquarium ...