"Central Park has nothing on the Bronx"
I love the Bronx Zoo. If you take the 2 train up from NYC, do know that you have to carry small kids and strollers down a flight of stairs. But once you get there, it's great. On Wednesdays you donate what you want, but if you don't pay, you miss the parts of the zoo that make it worth going to. Our family's favorite parts are the huge Congo Gorilla Forest, Dora and Diego's 4D movie (warning: it squirts water on you, not a lot but some little ones don't like it), bug carousel, children's zoo, and the Asia monorail (the only elephants are there). Peacocks and Peahens roam freely, so watch your food! There are several places where you have to park your stroller, so I keep my diaper bag light with my important things, and leave the heavy water and the rest in the stroller. We avoid it on weekends, and try to go on cooler days in the morning to beat the lines. They have a lot more animals than they list on their website, like the okapi and tapir at the Congo Gorilla Forest. You can't see everything in one day, so we usually skip the African Plains and all the birds. There are some beautiful Koi fish at the Butterfly Garden, but I would skip that too if it weren't for my daughter. Few things can compare to the San Diego Zoo, but the Bronx beats out the National Zoo in DC and Philly easily. And that tiny one in Central Park. We usually bring some food and buy some at the Crane Cafe. It's priced reasonably for a zoo.