NPR's Melissa Block talks to Gerry Scully of the Irish food and agricultural authority about the use of GPS tracking devices to monitor the movement of sheep in County Mayo. Sheep have been ...

Sam Sandberg uses satellite the collars on her cattle at Lyneham Heath Farm near Chipping Norton.

Q: How do wildlife collars work, and what factors are taken into consideration before the California Department of Fish and Wildlife (CDFW) attaches them? A wildlife care worker attaches a tracking ...

Three more bighorn sheep have died in the Catalina Mountains north of Tucson this month — two of them falling prey to mountain lions and the other dying of an undetermined cause. Meanwhile, all but ...

“When spring comes, we’re going to be out there every day tracking these collared ewes, especially when they isolate themselves and look like they’re going to give birth,” he said. “Then we’ll be ...