Pronghorn Dash

A pronghorn fitted with a GPS collar leaps through the snow. Scientists in Idaho have set up a similar collaring program to track the migration of thesegrazing mammals. The Idaho pronghorns make an 80 mile (129 kilometer) journey between their summer and winter ranges, and human development can cut off their migration routes. The collars, which eventually drop off of the animals, will give researchers a better idea of which areas are crucial to pronghorn migration, according to the Wildlife Conservation Society.