People come to see the Pandas. They get star billing. Their habitat is the first thing you see. Because people love pandas, the zoo can make money selling stuffed panda dolls, dancing panda dolls, panda umbrellas and panda hats. The zoo exists for the Pandas.
People know where the best attractions are.
Follow the crowds and you'll see the best animals. Word of mouth marketing is the most powerful weapon you can use. People know which animals in those attractions are the best ones. Follow the crowds to the bear pit. Then look for the lady in the crowd who knows that one bear and one bear alone knows how to dance for its dinner.