How Coley is Being Tracked

Coley was equipped with a lightweight GPS transmitter in May 2012 by Dr. Kennedy. It weighs 30 grams (about 1 ounce) and is strapped on like a backpack.

A view of the GPS backpack on Coley's back

The transmitter is solar-powered and communicates Coley’s location, altitude, speed and course by satellite every hour for 12 hours a day.

Dr. Kennedy explains more about the tracking here:

This video shows him outfitting Coley with the backpack: