Scientific name: casuarius casuarius
Cassowaries are very large flightless birds that live in tropical forests of New Guinea and northeastern Australia. The only birds bigger than the cassowary are the ostrich and emu. Cassowaries mainly eat fruit, but will also eat new shoots, seeds and fungi, insects and small animals. Cassowaries usually travel around on their own except when it is time to find a mate and lay eggs. The booming noise the cassowary makes is the lowest known bird call, and is so low humans can only just hear it.
Scientific name: dromaius novaehollandiae
Emus are a large flightless bird that lives in Australia. It is the second-largest bird, after the ostrich. They eat insects and some plants. Emus lay very large, speckly blue eggs with hard shells. The male emu looks after the eggs and babies.
Scientific name: apteryx mantelli
Kiwi are flightless birds from New Zealand. They are around the size of a chicken, and for their body size they lay the largest egg. The kiwi is a national symbol of New Zealand. Not to be confused with the kiwi fruit.
Scientific name: struthio camelus
The ostrich is a large flightless bird that is native to Africa. It is the largest bird in the world, and is farmed for its meat, skin and feathers. The ostrich egg when first laid contains the largest single cell on earth.
Scientific name: family: spheniscidae
Penguins are birds that live in the sea in the southern half of the world. There are many different kinds of penguin. They are excellent swimmers and are well-adapted to cold water. They eat fish and other small sea animals. Penguins cannot fly - their wings are used as flippers when they are swimming. Some people think penguins look like they are wearing a tuxedo.