ANGEL ISLAND lies in San Francisco Bay separated from the mainland by Raccoon Strait, a 3/4 mile wide deep water channel. So how did the deer get here? The Island was once connected to the mainland centuries ago so they might have walked or swam here. However, it's more likely the military personnel imported more by boat so they could hunt them for sport until they abandoned the forts. With no natural predators, the deer overpopulated the island and were threatened by starvation, so they're now controlled by trapping and removal to maintain a healthy herd.
During visits to the island we often come across remnants of a small family (Papa, Momma, and Bambi) grazing in the woods and meadows, and they're pretty tame in the company of strangers. Not a bad life for them, and lots of fun for us.