Discover strange facts about flightless birds: ostriches, emus, cassowaries, kiwis, rheas, and the birds that traded the sky for speed, size, or stealth.

Explore the world of flightless birds, from the 45 mph ostrich to the dagger-clawed cassowary and the extinct dodo. Expert-written guide covering ratite evolution, the Great Emu War, kiwi biology, penguin adaptations, kakapo conservation, and the de-extinction debate surrounding elephant birds and m

Ostriches run 70 km/h and kick with 2,000 N of force. Expert guide to the largest living bird and how it traded flight for ground speed.

Everything about the emperor penguin: size, Antarctic habitat, deep-diving diet, winter breeding, male incubation, conservation, and the strange facts that make Aptenodytes forsteri the world's largest penguin.

Everything about the southern cassowary: size, habitat, dagger claws, the disputed bony casque, rainforest seed dispersal, parenting by males, conservation, and the strange facts that make Casuarius casuarius the world's most dangerous living bird.

Everything about the kiwi: size, habitat, the only bird with nostrils at the tip of its bill, enormous 20-percent-body-weight eggs, marrow-filled bones, nocturnal foraging, conservation, and the strange facts that make Apteryx New Zealand's national bird.

Everything about the ostrich: size, habitat, speed, eggs, anatomy, reproduction, and the strange facts that make Struthio camelus the largest living bird and the fastest runner on two legs.