What are the four characteristics of birds?

Answer 1

Birds have many characteristics, but all birds share four specific traits. Four chambered heart, hollow bones, diapsid skull, reversed toes, and a fused collarbone are traits that all birds share.

Answer 2

they have many characteristics such as feathers, vertebrates , they lay eggs,and their bones are lightweight and usually hollow

Answer 3

Birds are classified as warmblooded animals. They eat worms and fly. They lay eggs and then they hatch.

Answer 4

Feathers. Many other animals have developed flight. Many other animals have hair, skin, scales, or fur but none have been able to attain the physical characteristic of feathers.

Answer 5

the ability to fly:)

the ability to sing:)

Answer 6

war