The estimate of 5.5 million species of insects is interesting. What’s even more remarkable is that because scientists have found only about 1 million species, that means more than 4.5 million species ...

Monarch butterflies are making their flight north after wintering in Mexico. Here's what to know about the fascinating, fragile traveler.

Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to ...

The massive annual spring migration of America's birds – millions of them – is underway. Here's how to follow along at home.

Highly pathogenic avian influenza, commonly called bird flu, has increasingly spread to mammals and infected hundreds of ...

(Reuters) -Highly pathogenic avian influenza, commonly called bird flu, has increasingly spread to mammals and infected ...

From tiny trackers on birds to larger elephant collars, scientists learn a lot from tracking animal movement in the wild.