It's not something I'd recommend. You technically COULD, but you'd be cheating yourself, rushing through everything. Although they're both "zoos" they vastly different. My parents live five minutes from the Wild Animal Park, and even now, after going there countless times every year, when we do go, we still spend the majority of the day there. It's a nice place to just "spend some time". The Zoo is the same, in my book. If you tired of the zoo, there are many many museums in Balboa park you could look into.