Flightless bird Flightless bird Flightless birds are birds that through evolution lost the ability to fly. There are over 60 extant species including the well known ratites (ostrich, emu, cassowary, rhea and kiwi) and penguins. The smallest flightless bird is the Inaccessible Island rail (length 12.5 cm, weight 34.7 g). The largest (both heaviest and tallest) flightless bird, which is also the largest living bird, is the ostrich (2.7 m, 156 kg). Ostriches are farmed for their decorative feathers, meat and their skins, which are used to make leather. Many domesticated birds, such as the domestic chicken and domestic duck, have lost
The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals is an encyclopedia of prehistoric and extinct animals which had a vertebrate. The "Encyclopedia" is published by Chartwell Books. Early Tetrapods Lepospondyls Early Reptiles Turtles, Tortoises, and Terrapins Semi-Aquatic and Marine Reptiles Marine Reptiles Early Diapsids Snakes and Lizards Early Ruling Reptiles Crocodiles Flying Reptiles Carnivorous Dinosaurs Early Herbivorous Dinosaurs Long-necked Browsing Dinosaurs Fabrosaurs, Heterodontosaurs, and Pachycephalosaurs Hypsilophodonts Iguanodonts Duckbilled Dinosaurs Armored Dinosaurs Horned Dinosaurs Early and Flightless Birds Water and Land Birds Pelycosaurs Theraspids Primitive Mammals Marsupials Glyptodonts, Sloths, Armadillos, and