The ostrich (Struthio camelus) is a large flightless bird that lives in Africa.
It has a long neck and long legs and can run up to 65 km/h (40 mph). It is the fastest land bird alive.
The ostrich is also the largest bird and lays the largest eggs.
The Galapagos tortoise is the largest living tortoise. It can only be found on the Galapagos islands.
They can weigh over 300 kilograms (660lb) and measure 1.2 meters (4 ft) long.
It is believed that Galapagos tortoises can live to 200 years.
A komodo dragon is a lizard. A very big lizard. The biggest lizard in the world.