We went on a docent guided bicycle tour of the SF Zoo on Sunday before the park opened and let me tell you, docents aside, by bike with an empty park is most definitely the best way to get around the zoo! It was an informative trip and I had a great time with my wife and a friend that invited us to go. Here's a few pictures I snapped along the way. The higher res ones I took with my D60, the lower res snaps were off of an all-in-one camcorder/camera kind of device that takes mediocre pictures, but you can't beat the convenience of it.