This, as everyone says, is a world class zoo. It is not to be missed if visiting San Diego. We only had half of a day (afternoon), so it was very hot and some animals did not feel up to entertaining. We knew this might happen so we took it in stride. There is so much to see. There are pandas, and a line to see the pandas, so as it can't be missed I recommend you go early. The baby panda likes to hang out in a tree so get your camera ready. The zoo has a really large aviary and the birds are plentiful throughout. There are cats of all kinds, lions included. There really isn't any animal they don't have. The arial tram was a treat to ride and made it easy to travel in the zoo. Be aware if you have children that the tour buses are everywhere and you need to be safe. These bus tours are available and can be used to see the zoo without getting out. This way, you can chose what you want to go back to see.