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Birds are warm-blooded.
Marsupials are mammals, so share all features with other mammals. As well, they are vertebrates, so share the characteristic of having a backbone with birds, fish, reptiles and amphibians. Like birds and reptiles, mammals breathe via lungs (rather than gills), and like birds, they are warm-blooded.
No. Birds, fish and reptiles are each a classification of "vertebrates" of their own. They all have quite different characteristics.
Lay eggs
Mammals, reptiles, amphibians, birds and fish are the five groups of animals.
All reptiles are diapsids. Mammals (like you and I) are, in contrast, synapsids. So in that respect all reptiles are alike. However, I would not say they were all alike. Snakes are reptiles but lack limbs. Alligators are also reptiles, as are lizards. Tuatara, gavials, amphisbaenids, and tortoises each represent one of the four main modern orders of reptiles. They share some characteristics--just as you and I do, but I would not say they were all alike.
Birds an Mice share some of the characteristics like : i) They both eat grains. ii) they both are herbivorous , carnivorous and omnivorous.
Both bats and birds are warm-blooded vertebrates that use their forelimbs as wings.
And they are most closely related to crocodiles, which also came from archosaurs. This is what most people mean when they say that birds are reptiles, although technically, according to the phylogenetic system, birds, reptiles, and mammals all share a reptile-like ancestor.
Fundamental characteristics that frogs and birds share include that they feed on other organisms and they move. Frogs and birds are vertebrates and they are multicellular.
There are certain birds that eat reptiles.
No. Birds and reptiles are separate from amphibians.