Besides the usual local birds which also visit the zoo freely are the local squirrels. The squirrels visit exhibits and forage food from either the caged animals or park visitors. They are fearless and let you come within a few feet of them before the take off.
With this recent visit, a little dialogue runs in my head about squirrels mocking the caged animals as they run about free around the zoo visiting different animals and stealing their food. Now that I think about it, isn't that an animated movie?