mammals give live birth and birds lay eggs
birds eat them and fish and reptiles and some mammals
Birds lay eggs and mammals don't and birds of course have feathers.
Yes, many birds of prey eat small mammals.
SIMILARITIES. Birds, reptiles, and mammals are all a part of the animal kingdom! (OH MY GOSH!) They all need the same things- food, water, vitamins, nutrients, and things of the such. They are all multi-cellular, eukaryotic organisms. They all have the ability to mate and raise/have offspring. These three also all have similar body parts, and body functions. DIFFERENCES. Mammals give birth to live offspring- birds and some reptiles don't and lay eggs. Birds have the ability of flight- mammals and most reptiles do not. Reptiles are covered in scales or some other form of rough 'coat'- birds have feathers (though some like the Cassowary have some rough and slightly scaly napes and such), and mammals have fur and things of the such. Reptiles and most birds are warm blooded- mammals are cold blooded. Hope it helped! :D ~AP Wulf
No. Despite sharing some characteristics mammals and birds are not closely related.
Yes, in some ways birds are very similar to mammals. In others, they differ completely.
Some birds prey on other birds because they are adapted and evolved to do so. This is no different than some mammals (such as cats and foxes) eating smaller mammals (such as mice and rats).
Some do, yes. Cats are notorious for preying on birds.
Nope. Some varieties of Bat do this but they are mammals, not birds.
Because mammals can't really use blue camouflage against things that aren't the sky (or water, i.e. whales). Birds are frequently high up, so they blend in with the blue sky. Some kind of adaptation.
Kestrels primarily feed on small mammals, insects, and small birds. They hunt by hovering in the air and then diving down to catch their prey with their sharp talons. They are also known to eat amphibians, reptiles, and even some fruits and seeds.
No, not only mammals have nipples. Nipples are also found in some other animals, such as birds and some reptiles.