Not just a number

This is the radio-tracking device where we listened for the signal. We had to wear earphones, which attached to the unit, when the truck was moving. When we picked up a signal we would tell our driver, who would stop the truck. Then we would identify which frequency we heard.

Each frequency was assigned to a different animal and each had a number. Some of us preferred naming the animals - since being only a number seems so impersonal!