Learn how to identify a Cassin’s finch ... They quickly spread to all eastern states and are now a commonly sighted backyard ...

Birds are vertebrate animals adapted for flight. Many can also run, jump, swim, and dive. Some, like penguins, have lost the ability to fly but retained their wings. Birds are found worldwide and ...

This Valentine's Day weekend, love will be in the air. So will birds, and scientists around the world are counting on the public's help to learn more about where those birds are and in what numbers.