A GPS antenna is placed at the top of each collar, and a bezel holds the camera box in place, ensuring that the lens is always pointed outward. The units can capture a field of view of up to 180 degrees and about 80 hours of video footage. Dellinger can study not only how deer respond to predators, but also how they use habitat, how they spend their time (resting, walking, or running), and even what they are eating. A sensor enables a viewer to tell if the animal is looking up, down, left, or right, while a GPS chip pinpoints a deer's exact location and can be used to calculate how fast the animal is moving.
In the second year of a four-year study, Dellinger is already seeing how the information collected can be used by both scientists and deer hunters.