Lincoln Park Zoo is a free zoo. It is in Lincoln Park neighborhood in Chicago, Illinois. The zoo was founded in 1868. This was when the Lincoln Park Commissioners were given a gift of 2 pair of swans. In 1874, the swans were joined by a bear cub. This was the first animal bought for the zoo. The bear became quite good at escaping from its home. It could often be found wandering around Lincoln Park at night. The first bison ever born in captivity was born in Lincoln Park. Marlin Perkins, who later gained fame as the host of the television program "Wild Kingdom", was director of the zoo from 1944 until 1962. Now, Lincoln Park Zoo is home to a wide variety of animals. The zoo includes polar bears, penguins, gorillas, reptiles, monkeys, and other species totalling nearly 1,250 animals. Also located in Lincoln Park Zoo is a burr oak tree which dates to 1830, three years before the city was founded. Lincoln Park Zoo is one of four zoos in the Chicago area, the others being the large Brookfield Zoo, and the minor Phillips Park Zoo, and Cosley Zoo. Lincoln Park Zoo is the only one within the Chicago city limits.