A Brentwood resident spotted a pair of mountain lions relaxing in a field near Sand Creek Road on Wednesday afternoon, police said.
A resident in the 700 block of Monte Verde Lane reported spotting the big cats at about 3 p.m. in the area south of Sand Creek Road and west of some railroad tracks there, Brentwood Police Lt. Doug Silva said.
"It's an open field area that's pretty rural but not far from some developments. They weren't in the residential area," he said.
No further sightings were reported, but neighbors are warned to steer clear of any mountain lions they see and to call 911 if they spot any.
Brentwood's last reported sighting was in 2008, Silva said.
"This time of year, the flood control basins are getting manicured, so there's a lot of movement in our open areas. They probably get the animals moving around," he said.
The California Department of Fish and Game says mountain lions claim more than half of California as their habitat -- especially in places where they can feed on deer.
"Mountain lions prefer deer but, if allowed, they also eat pets and livestock," the department's website said. "In extremely rare cases, even people have fallen prey to mountain lions. Mountain lions that threaten people are immediately killed."
Pet and livestock owners may kill lions that threaten their animals, but only if they get a state license first, the site said.
"If you encounter a mountain lion, do not
Property owners in areas where the lions are common are advised to keep their brush trimmed to reduce places where the animals can hide.
Pet owners are advised to keep their pet food put away, and to keep their animals protected during the hours mountain lions are most active: dawn, dusk and at night.
The mountain lions have yet to pose a threat by approaching a neighborhood, Silva said. Residents must only be aware of their presence.
"It's not like they were stalking anybody or getting close to any houses," he said. "Maybe just waiting for a small rodent to pop up."
Staff writer Erin Ivie contributed to this report. Contact Sean Maher at 925-943-8013.