they both have a four chambered heart
Birds and mammals both evolved from reptiles.
Birds have a 4-chambered heart, a characteristic in common with mammals.
Mammals, birds, and crocodilians have a four-chambered heart.
Alligators have a 4 chambered heart, just like birds and mammals
Of course not ...no birds are mammals !!!!!!!!!!!No, they are birds.
Mammals and birds have four-chambered hearts.
The first type of heart is the simple two chambered heart, which is found in fish. The second is the third chamber heart, which is found in amphibians and reptiles. Mammals and birds have four chambered hearts.
No. Birds have only one heart, but they have four chambered hearts like all mammals and crocodiles do.
No. Birds and mammals are separate classifications.
1. Mammals 2. Reptile 3. Fish 4. Amphibians 5. Birds
No, they are birds.
No. Birds are not mammals.