From 9-foot tall ostriches to albatrosses with gargantuan wingspans, here are some of the biggest birds in the world.

Marina Henke: With insects, wings diversify even more. That’s because when you're really tiny, the viscosity of the air ...

The battle between the falcon and the eagle has fascinated people for centuries, with both birds showcasing incredible power ...

In a rare and unexpected sighting, a juvenile masked booby bird — typically found far offshore in tropical regions — was ...