What the `Frig` is that?

The male `frigate` has a red pouch on their throat. When they want to attract a female they pump it up with air so it looks like a balloon. They leave it inflated all day and hang around on the ground showing off and calling out to female birds flying overhead. They can`t dive in the water for food like the other birds; they can become water logged and die. Instead they steal food from other birds. During the boat trip there were often frigatebirds soaring above us.