Mule deer
Other non-native animals currently living on the island include the blackbuck, bullfrog, feral cat, mule deer, rat, and common starling. Mule deer were introduced to the island in the 1920s and 30s, and currently have a population density roughly 10 times that of California generally. The island was also previously home to populations of cattle, feral goat, feral pig, and sheep, but these animals are no longer present.