Animal tracking with "Smart Collars"

There is an interesting arcticle in today's New York Times about the use of a new breed of animal tracking collars that use on board computers to track valuable information about an animal, beyond location alone.  The new "smart collars" can be used to track when an animal is sleeping, when it is feeding, and lots of other metrics.  The additional data being gathered gives biologists more information to work with while trying to understand the animals habits and needs, in order to provide informed wildlife management decisons.