North American porcupine
This historic exhibit, on the National Register of Historic Places and originally opened in 1918, is one of the first natural-style zoo exhibits in North America and the first to use simulated concrete rocks. It underwent a $250,000 restoration between 1987 and 1989. After Bear Mountain's grizzly bears were moved to a newer exhibit, it has become home to smaller species like cinereous vultures and a North American porcupine.