The avian endocrine system consists of a series of glands that produce and secrete substances known as hormones. These steroids or proteins travel through the bloodstream and act as chemical ...

Despite their incredible diversity in shape, color, and size, most people find it easy to distinguish birds from other vertebrate classes like mammals and reptiles. The tiny, jewel-like Hummingbird is ...

Birds aren’t distributed randomly across the globe. Instead, each habitat supports its own unique collection of bird species that have evolved to live there. Picture a deep green forest, an open ...

Browse our growing list of species guides to learn all about birds.

Each bird family carries a unique tale of evolution, habitat, and behavior. From the majestic raptors to the enchanting songbirds, discover each family in our in-depth guides below to start learning ...

Browse our growing list of species guides to learn all about birds.

Browse our growing list of species guides to learn all about birds.

Ghosting through boreal forests with eerily silent flight, this massive owl's piercing yellow eyes and distinctive facial disc make it a haunting presence in northern wilderness areas. The Great Grey ...