Thousands of Migrating Animals Are Forced to Cross This Dangerous Highway Every Year ...

Migrating animals have for a long time been tracked by recapturing tagged individuals. More recently, radio-telemetry, which requires an observer to physically follow the tagged animal, has been used.

In late spring, as the days begin to lengthen, the mule deer of central Wyoming begin to “surf” the sagebrush landscape. Their break is found in the low flats where they spend their winters. That’s ...