Today, mule deer are the largest wild animal inhabiting the valley and foothill area; historically, large herds of tule elk frequented the area, but their habitat in the Kaweah Delta has been almost entirely eliminated by agriculture. There are many species of foxes, wildcats, squirrels, and rabbits including the endemic San Joaquin kit fox, San Joaquin antelope squirrel, and others. California grizzly bear and beaver were once common to the area but were hunted or trapped out entirely by the early 1900s. The mountain areas continue to provide habitat for black bears, mule deer, and bighorn sheep, and the Kaweah River above Three Rivers has native rainbow trout and introduced brown trout and bass. In alpine areas above the tree line, small mammals such as marmots and pika are common.