A fossil study shows Gastornis roamed around Ellesmere Island, Canada, when it was far warmer than today.
Some of the best medicine is being practiced by doctors whose patients aren't human.
At least one bird died this year after possibly colliding with another bird in the lights above the 9/11 Memorial and Museum.
Invasive grasses and fires threaten the bird's habitat.
The number of drones spotted trumped by the number of birds hit, data shows.
The spill is five times larger than originally estimated.
Authorities estimate 105,000 gallons of oil have spilled.
The heartland bird has lost 80 percent of its range in part because of renewable energy development.
The blackpoll warbler can fly nonstop for three days over the ocean.
This Sunday is for the birds.
The low-frequency sound of intense storms can alert birds that they need to leave, post-haste.
The birds were over four feet tall.
A new study is the first to sequence in detail the microbiome of a bird.
There are more than 400 million fewer European birds now than there were 30 years ago.