From thousands of monarch butterflies painting the skies to massive herds of bison on the move, the U.S. is home to some of the most breathtaking animal migrations on Earth. These incredible journeys ...

This story appears in the November 2010 issue of National Geographic magazine. Animal migration is a phenomenon far grander and more patterned than animal movement. It represents collective travel ...

Even as you read this article, animals are charging forward, moving from one region or climate zone to another in search of new feeding and breeding grounds. Songbirds may be finishing up their yearly ...

Animal migration has fascinated humans for millennia ... At the end of every summer, more than 100 million individuals sweep across North America to overwinter up to 4,750 km further south ...

When you think about all of the amazing animals in this world, you might tend to think about the large furry critters such as bears or moose. Yes, there are many crazy-cool mammals. In fact, there ...

Stable isotopes have helped uncover migratory routes, trophic levels, and the geographic origin of migratory animals. They can be used on land as well as in the ocean and have revolutionized how ...