Happy Cub, Grumpy Cub
When you observe bear cubs (any species) for an extended period of time, you start noticing individuals' personality traits. These two Coastal Brown Bear (Ursus arctos) cubs were hanging out while their mother fished the shallows for salmon. After a nap, they got up on their hindquarters. Here the "happy" cub on the left seems to have annoyed the "grumpy" cub on the right. Dispositions of infants change quickly, though, and after a moment of stink eye, they were running and playing together again. Lake Clark National Park, Alaska.