A once-extinct bird has laid eggs in the wild for the first time in nearly 40 years. After returning to the wild in 2024, the ...

Biologists have long debated why some plants and animals can adjust to a wide range of climates, while others can't.

The birds were eliminated when the invasive brown treesnake was accidentally introduced to the island of Guam in the ’40s.

A White-necked Jacobin chick may use mimicry or camouflage to avoid predators, resembling a caterpillar with fluffy feathers.

Participants in the 2025 Great Backyard Bird Count recorded 8,131 species of birds and submitted about 325,000 checklists, both records in the event.