Birds range from tiny hummingbirds to giant condors in the skies. These giant birds of prey will have you feeling the size of ...

But even the fiercest groups of birds have diminutive members, little wide-eyed eaters of insects and small rodents like the 4-ounce American kestrels and saw-whet owls. Despite being similar in ...

The analyses revealed these feet would have been strong enough for these birds to pick up small mammals and potentially baby dinosaurs. [Related: The first true flying vertebrates walked before ...