False — Birds

The story behind the answer

False. Birds are uniquely defined by feathers—no other living animals have them. They also have beaks (no true teeth), wings as modified forelimbs, a bipedal stance, and they lay hard-shelled eggs. Even flightless birds like ostriches and penguins still have feathers and beaks.

Use the “feathers-first” rule to recognize birds fast: if you see feathers and a beak, it’s a bird. If you see fur and teeth (a mammal, like a bat), scales without feathers (a reptile), or six legs and antennae (an insect), it’s not a bird. Feathers are the clincher.