The Ratite family includes flightless birds with a flat, keelless breastbone (the keel is where the flight muscles connect). Most of their muscle is in their legs and thighs. There are only five species around the world. Cassowary, Emu, Ostrich, Rhea and Kiwi.
Fact about Ratites
The ostrich is the fastest two-legged runner of all the animals on Earth. The ostrich is also the world's largest bird.
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