AP BIOLOGY

Detailed explanation-1: -Penguins are flightless seabirds that live almost exclusively below the equator. Some island-dwellers can be found in warmer climates, but most-including emperor, adélie, chinstrap, and gentoo penguins-reside in and around icy Antarctica.

Detailed explanation-2: -But there are other birds that can’t fly (like emus, ostriches and cassowaries), and penguins fulfil all the biological requirements to be classified as birds-they have feathers, they lay eggs and they’re warm-blooded.

Detailed explanation-3: -Penguins, or Sphenisciformes, are not mammals, but birds. They are different from mammals in that they have feathers instead of hair or fur, and unlike most mammals penguins lay eggs instead of giving live birth. Like all modern birds, penguins don’t have teeth, though most mammals do.

Detailed explanation-4: -To dive deep, to catch fast-swimming prey, and to survive frigid temperatures, their bodies have huge fat supplies, heavy muscles, and densely packed feathers. There’s no way they could fly with such short wings and heavy bodies.

Detailed explanation-5: -Penguins (order Sphenisciformes /sfɪˈnɪsɪfɔːrmiːz/, family Spheniscidae /sfɪˈnɪsɪdiː/) are a group of aquatic flightless birds. They live almost exclusively in the Southern Hemisphere: only one species, the Galápagos penguin, is found north of the Equator.