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The answer is Cenozoic in the beginning of this era there were few mammals and birds but longer down the road more animals appeared as the era continued.
And so my answer would be Cenozoic but i am not completely sure.:(
ANSWER ABOVE IS INCORRECT
Mesozoic is the correct answer small mammals evolved during the Mesozoic era, with reptiles, as did birds. The full potential and releasing of mammals came in the Cenozoic, when the mass extinction of 20% of the Mesozoic's species happened.
What else can I help you with?
What was the era in which birds mammals and flowering plants appeared?
Mesozoic(:
Are dinosaur birds mammals?
Birds are now classed as dinosaurs, but most dinosaurs were not birds. Neither dinosaurs nor birds are mammals.
What geologic era is known as the age of mammals?
Mammals proliferated during the Cenozoic (recent age--since the end of the Cretaceous 65 million years ago). There were mammals before the Cenozoic, but dinosaurs were the most abundant fauna of that era. Reptiles, birds, fish, and turtles continue to exist. There are over 8000 species of birds, but fewer than 6000 species of mammals.
Are birds of paradise mammals?
Of course not ...no birds are mammals !!!!!!!!!!!No, they are birds.
Are most mammals covered with feathers?
Mammals are not covered with feathers. Mammals grow hair, but do not have to be covered with hair. Birds are covered with feathers.
Are hawks mammals?
No. Hawks are birds, not mammals. Although birds are warm-blooded, they do not nurse their young, and most have lighter bone structures than mammals.
What are the characteristics of mammals have that distinguish them from birds?
Mammals have fur, while birds have feathersMammals give birth to live babies, birds lay eggsMammals feed their babies milk, birds find the babies food
Are eagles mammals?
No, they are birds.
Are birds the only mammals with feathers?
No. Birds are not mammals.
Are all mammals warm blooded vertebrates?
Yes, all mammals are warmblooded vertebrates.Yes, all mammals are warm blooded vertebrates. So are birds. The difference between birds and mammals is that birds have feathers and lay eggs, while most mammals give birth to live young, and all mammals have hair and produce milk for their young.
Are cassowary birds mammals?
No. They are birds. Birds and mammals are separate classes of animal.
Are cassowaries mammals?
No. They are birds. Birds and mammals are separate classes of animal.
