Spring and summer are important feasting times for polar bears—especially for mating females, who have to store enough fat to be able to have cubs in the fall. Learn more about the amazing breeding behavior of polar bears: bit.ly/pbearbreeding | Polar Bears International

Spring and summer are important feasting times for polar bears—especially for mating females, who have to store enough fat to be able to have cubs in the fall. Learn more about the amazing breeding behavior of polar bears: pbears.org/3WGmHxl | Polar Bears International

Polar bears have a polygynous mating system, which means that males will mate with multiple females and that their mating system is driven by sexual competition between males. Males and females are also different sizes—a male can be 2-3 times the size of a female. For male polar bears, age is the most important factor in their ability to access females. This is likely because age is closely tied to body size, and we can assume it is also tied to their ability to compete against other males. Lear