Katmai National Park is home to the largest population of brown (grizzly) bears (Ursus arctos)Â in North America. Mature male bears in Katmai may weigh up to 1500 pounds. In summer they gather at streams to feast on salmon, build weight from this wealth of protein and fat, and prepare for the coming long winter. The bears at Brooks Falls all have different strategies for catching fish and claim territorial positions in the river as well as on and around the falls. This young bear in the foreground, probably three years old, spends his time observing the older males, like the one in the background, learning their fishing techniques and scavenging scraps as they float downstream. His challenge is to determine which strategy suits him the best. The mature male in the background, one of 14 at the falls that day, sat in the same spot, focused on the water immediately in front of him, and caught fish unwary enough to venture into his kill zone. Optimum efficiency on his part. A good day of fishing is considered to be ten fish in a day. He caught six in the two hours I spent at the falls.