Inflation is not always a bad thing especially if you are a creature trying to scare off predators, attract mates or protect your territory. Check out this gallery of puffed up animals including frigatebirds courting by expanding their bright red gular pouches, frogs advertising using their vocal sacs and porcupinefish expanding their whole spiky bodies to warn off predators. Did you know that walruses puff up two air pouches in their necks to stay buoyant while floating, male prairie chickens can be heard a mile away when using their sacs to boom and hooded seals expand a balloon-like sac from their nostril during courtship and territorial disputes?
