Trail cameras were set up in the Sunol hills in California and captured images of nine cougars.
Researchers are attempting to find out why numerous mountain lions are frequenting the Sunol hills in California, south of the city of Livermore. Mountain lions are philopatric so the females return to the place they themselves were born.
Experts have set up trail cameras around the Oholone Wilderness area and have counted nine predators total.
Mountain lions don’t usually congregate in such a small area and ecologists in the East Bay Area are trying to figure out if the lions are there randomly or if they are returning to their home ground.
Two males, four females and three sub-adult cougars have been spotted on the trail cameras.
Cougars were thought to be extinct from Northern California a decade ago but now the population is thought to be around 4,000.
The trail cameras are also catching other species that are thriving in this wilderness area.