Bear Mortality

Bears are not just an interesting animal, because they rely on healthy forests to survive, they are also an excellent indicator of forest health. Aside from the success or failure of forest forage crops (the things bears eat, like berries and nuts), other factors that may influence bear mortality include bear population size, new development of human homes and cities, and timing of when bears wake-up from hibernation.

In the Forest Health Index, bear mortality refers to the number of bears found dead from January through August, the season during which bears cannot legally be hunted. These deaths may be caused by: natural events, roadkill, bears put down by federal or state officials, bears killed by landowners, and unknown causes.

What We're Seeing

Near average: Bear mortality was near average. This means that forest conditions were similar to the conditions bears are adapted to, and an adequate amount of acorns and berries were available.

What We're Monitoring

Since 1981, bear mortality has increased, although the number of deaths varies from year to year.
Bear mortality represents other forest conditions, like the abundance of acorns and berries, but it also represents an important risk to human safety. As Colorado’s human population, city development, and recreational activities continue to grow, people who live and play in Colorado may need to increasingly make choices to prevent humans and bears from interacting in ways that may be dangerous to both.

Future Outlook

Climate models show temperatures continuing to rise in Colorado in the coming years. For bears, warmer days at the end of fall or start of spring might mean a shorter time spent in hibernation—with the potential outcome being that bears are awake and hungry for longer periods of time. Meanwhile, changes in precipitation patterns may alter the availability of wild food for bears. There are many things individuals can do to help prevent bear mortality. Keeping garbage cans inside or using bear-proof containers, avoiding leaving snacks in cars with open windows, and remaining a safe distance from bears and other wild-life can help reduce dangerous encounters and prevent bears having to be either relocated or put down.