It’s been one mountain lion kitten den after another this summer for National Park Service biologists in the Santa Monica Mountains and Simi Hills. In total, 13 kittens were born to five mountain lion mothers between May and August 2020.
This is the first time this many mountain lion dens have been found within such a short period of time during the 18-year study, in which a total of 21 litters of kittens have been marked at the den site by researchers. Previously, the highest number of dens found in one year was four (across 10 months in 2015). Three additional litters have been found when the kittens were older (at least six months old) and had already left the den site.