If you want to see some Buffalo on your trip, ask about the Inland Motor Tour. You will be driven around the island and the chance you see the buffalo are pretty good.
The story behind the animal is quite interesting. They were filming a picture and when they finished, they left the animals. The buffalo liked the area and multiplied, requiring the humans to manage the beasts these days.
The funniest thing, almost as amazing as the flying fish is watching buffalo on a beach. It is such a shock to see because of the contrast. You assume these creatures to be hanging out in the forest or something.
Do try to see the amazing animals.