Two mountain lion litters found in California mountains

June 22, 2016: The National Park Service released this picture of kitten siblings P50, P-51, and P-52 Litter in the eastern Santa Susana Mountains (AP) 

THOUSAND OAKS, Calif. (AP) — The National Park Service has released photos and video of two litters of mountain lion kittens in the Santa Susana Mountains north of Los Angeles.

The Park Service said Wednesday the five kittens — three females and two males — were tagged and returned to their dens.

The service studies how mountain lions survive in fragmented and urbanized habitat around Los Angeles.

Biologist Jeff Sikich says lions appear to be reproducing successfully. But he says the real challenge is when the kittens grow older, disperse and have to deal with threats from other mountain lions, busy roads and poisons.

One litter includes two females, offspring of a mother dubbed P-35. The others are two males and a female born to mother P-39. Both litters likely have the same father, P-38.