Birds

True or false: Birds are warm-blooded vertebrates?

True or false: Birds have toothless beaked jaws?

True or false: Birds lay hard-shelled eggs?

True or false: Birds have a four-chambered heart?

True or false: All birds have the ability to fly?

True or false: Birds are the only animals that have feathers?

True or false: The bee hummingbird is the smallest bird in the world?

True or false: Passerine birds are also known as 'perching' birds?

True or false: The extinct moa and elephant birds are the only known bird groups without wings?

True or false: Some bird species have adapted digestive and respiratory systems for flight?