Question: Which of the following is not a bird?
A Penguin
B Ostrich
C Bat
D Parrot
Answer: Bat
| Characteristic | Birds | Animals resembling Birds |
| Classification | Class aves | Various classes and phyla |
| Feathers | Birds have feathers, which are unique to them. | Some animals have feathers, while others may have fur, scales, or other coverings. |
| Wings | Birds typically have wings with feathers. | Some animals have wing-like structures or adaptations for gliding, but they may not be true wings. |
| Flight | Most birds are capable of powered flight. | Some animals, like bats and flying squirrels, can also fly. |
| Endothermy | Birds are warm-blooded, maintaining a constant body temperature. | Some animals, like mammals, are also warm-blooded, while others, like reptiles, are cold-blooded |
| Reproduction | Birds lay eggs with hard shells. | Some animals, like reptiles and monotremes (e.g., platypus), also lay eggs, but the shell composition may differ. |
| Mouth/Beak | Birds have beaks without teeth. | Some animals have beak-like structures, such as turtles and certain fish, but they may have teeth or other mouth adaptations. |
| Respiration | Birds have lungs and air sacs, facilitating efficient oxygen exchange. | Other animals have different respiratory systems; some may have lungs, while others may have gills or other adaptations. |
| Tail | Birds often have tails, which vary in shape and size. | Some animals may have tails, but they can differ in structure and function. |
| Examples
| · Sparrows · Eagles · Penguins · Parrots · Ostriches | · Bats · Flying squirrels · Butterflies · Flying fish |