Only mammals have mammary glands. These are the means by which the female nurtures her young on mothers' milk.
Mammals are also the only vertebrates with fur or hair.
Birds are the only things that have feathers and hollow bones.
Male birds do not lay eggs. Only female birds have the ability to lay eggs.
No, insects and bats have wings and neither of them are birds.
Feathers are the only adaptation that all birds have. Birds have wings. They are the only vertebrates that do have wings, even though in some birds they are non-functional. However, they are not the only living creatures to have wings, as many insects do as well. Thee are some adaptations that are not found in all species of birds, but which are unique to birds. Flighted birds have light weight hollow bones developed for flight, but this is not found in all birds. Some birds have complex adaptation of the larynx which allows high speed complex bird calls to be created, but again, this is not found in all birds.
Three observations include:Birds exist, as do the beach and the time of noonBlack birds existWhite birds existBlack birds can be seen at noonWhite birds can be seen at noonBlack birds can be seen on the beachWhite birds can be seen on the beachBlack and white birds can be seen at the same timeInferences can include:There are only black birds and white birdsBirds can only be seen at the beachBirds can only be seen at noonBlack birds cannot be seen without white birds, and vice versaAny black or white creature on the beach at noon is a bird
It is not only birds that fly. Bats fly and they are not birds.
Swans are the only birds that have penises.
Birds are the only things that have feathers and hollow bones.
Birds are not the only animals who live in trees.
No. Birds are not mammals.
Ornithologist studies only birds. Ornithology is the study of birds.
Not all birds <><><> If you meant Rabies, only mammals can get rabies. Birds are not mammals.
no birds only have 3 lives to live
I only know one but a the dodo birds did.
No. Only birds have feathers. Kangaroos are mammals, not birds.
Only in the game angry birds
Birds are not mammals. They are in their own category, which is "Birds". The only two egg-laying mammals are the platypus and the echidna, which are classified as monotremes.