Birds have hollow bones, while most mammals do not.
Birds lay eggs, while 99% of mammals do not except for a platypus.
birds
No. Despite sharing some characteristics mammals and birds are not closely related.
Bats are not birds because they are mammals as they have the characteristics of a mammal. They have these characteristics which enable them to be classified as mammals. They are warm blooded, and they have fur.
Birds and mammals are mutually exclusive categories of animal. Monotremes (duckbilled platypus and echidna) are sometimes incorrectly said to be "half-bird" because they lay eggs instead of giving live birth, but they share more characteristics with mammals and are classified as such.
Mammals, reptiles, amphibians, birds and fish are the five groups of animals.
Of course not ...no birds are mammals !!!!!!!!!!!No, they are birds.
to distinguish a group of things with similar characteristics e.g. mammals are all warm blooded, reptiles cold blooded.
No. Mammals and birds are both vertebrates, particularly amniotes, but beyond this they are not relate to each other. They share a number of characteristics including:Warm bloodednessA high metabolic rateA four-Chambered heartA soft covering over their skincaring for their young.But Mammals and birds developed these traits separately.
Birds-------------------------mammalsfeathers--------------------furEggs-----------------------live youngdoesnt produce milk------produces milk
Birds and mammals both have the following:a backbone and internal skeleton, as they are vertebratesthey are warm-bloodedthey breathe using lungs (not gills)
No, they are birds.
No. Birds are not mammals.