Most people will never see a mountain lion nursery. That is exactly as it should be. Dens and nursery sites are selected for concealment, and close human attention can place a mother and her kittens at risk. For researchers, however, that secrecy leaves a major gap: some of the most important weeks in a cougar’s life are also the least observable.
A peer-reviewed study from northwestern Nebraska narrowed that gap without handling the animals. In November 2024, a remotely placed camera continuously monitored a nursery for seven days. It produced 403 videos representing 76 distinct bouts of activity.
A family that rarely appeared all at once
Researchers confirmed that four kittens used the nursery. Yet most recordings showed only one or two. That detail is scientifically important. A camera image is not automatically a complete count. Kittens may be behind the lens, concealed by vegetation, sleeping elsewhere or moving in and out of view.
For population studies, a brief glimpse of two kittens could easily be mistaken for a litter of two. The nursery footage is a reminder that wildlife data records what a method can detect—not necessarily everything that is present.
The language of a cougar family
Play was the behavior recorded most often. The camera also captured grooming, chirping contact calls from kittens, low purring-like vocalizations from the mother, and the mother carrying kittens. That carrying behavior appears consistent with relocating young, a normal strategy that can help keep a nursery clean or reduce the danger of remaining in one place.
These observations complicate the familiar picture of the cougar as silent and solitary. Adult mountain lions usually live and hunt alone, but motherhood creates an extended period of communication, touch, learning and coordinated movement.
Source: https://onlinelibrary.wiley.com/doi/full/10.1002/ece3.71687