A pair of energetic mountain lions has been recently found in the Santa Monica Mountains and are two of southern California’s newest residents

The National Park Service released adorable video on Thursday, featuring the pint-sized babies hissing and purring at the camera in the front of their wooded den.

Biologists with the National Park Service said that the footage of the male and female was captured soon after their mother, who got a tracking device shortly after she was born, left the den.

Another video was captured when the mother came back to the den. The video showed the kittens squeaking and nuzzling one another before their mother inspected and licked them.

The finding confirmed the suspicions of researchers that the mother, dubbed P-45, wherein P stands for puma, had given birth recently.

On Thursday, the NPS said in a release that her GPS locations displayed that the mother remained in one particular area during a 21-days-long period, which indicated that she was probably denning with her kittens.

They said that researchers have been tracking the mother since 2010 when she was only some weeks old. In another video the mother was clearly seen wearing a tracking collar around her neck.

When a YouTube user showed his concern over the size of the device, researchers responded to him saying that the collars make up a quite small percentage of the animal's mass.

In one video's comment section, they mentioned, “During our 13 years of using them to track mountain lions in and around the Santa Monica Mountains, we have seen no evidence that they impact the animals movement, hunting, reproduction, or care for its offspring”.

They added that the more recent collar versions have new features, such as drop-off mechanisms, allowing them to either program the collar to fall off at a particular date or can be remotely triggered using a computer.