Penguin Penguin Penguins (order Sphenisciformes, family Spheniscidae) are a group of aquatic, flightless birds. They live almost exclusively in the Southern Hemisphere, with only one species, the Galapagos penguin, found north of the equator. Highly adapted for life in the water, penguins have countershaded dark and white plumage, and their wings have evolved into flippers. Most penguins feed on krill, fish, squid and other forms of sea life which they catch while swimming underwater. They spend roughly half of their lives on land and the other half in the sea. Although almost all penguin species are native to the Southern Hemisphere,
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