link between aves and mammals
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Aves
. They are warm blooded animals.
. They have four chambered heart.
. They breathe through lungs.
. They have an outer covering of feathers.
. Their two fore limbs are modified into wings for flying. They lay eggs.
. Example : Crow, Sparrow, Pigeon, Duck, Stork, Ostrich etc.
Mammalia ( Mammals)
They are warm blooded animals.
They have four chambered heart.
They have mammary glands for production of milk to nourish their young ones.
The skin has hairs and sweet glands. Most of them give birth of their young ones.
some of them lay eggs ( like Platypus and Echidna)
Example : Cat, Rat, Dog, Lion, Tiger, Whale, Bat, Humans etc.
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