The salmon runs begin in the summer and continue on through late fall or early winter. The salmon die shortly after spawning and it is their carcasses which provide large quantities of food for the eagles. This combination of open water and large amounts of food bring large concentrations of eagles into the Chilkat Valley beginning by early October and lasting through February. The Bald Eagle is found only on the North American continent. Adult eagles generally weigh between nine and twelve pounds and have a wing span of seven feet.
Females are slightly larger than males.
Immature eagles are mottled brown and white. The distinct white head and tail of the mature bird is developed between four and six years of age. Eagles feed mainly on fish, but water fowl, small mammals and carrion supplement their diet, especially when fish are in short supply. Eagles can fly up to 30 mph and can dive at speeds up to 100 mph. Their keen eyesight allows them to spot fish at distances of up to one mile.