i suppose in the UK it is a rat - urgh! but otherwise its a thing that has babies but not in an egg, like a bird is not a mammal because its babies are born in eggs mut sheep or horses etc. there mammals because they don't lay eggs.
humans
Dogs and cats are the most common mammal pets.
Bat species account for 20% of all mammals. The mouse is the most common mammal in the United States. Humans of course! Humans are probably the most common mammal in the world.
I would guess rats are the most common mammal in the world.
I would dare to say the most common mammal would be the brown rat (Rattus norvegicus), and not only in Mexico but also in the world.
I would guess rats are the most common mammal in the world.
the most common eye color is brown Brown.
It is hare or rabbit
Addison
The Cuban Hutia is the largest and possibly most common native mammal. It is a rat -like animal that lives in trees and grows to about 2 feet long.
Carnivores are the second most common order of mammals, ungulates being the first.
Various dolphins and whales are very common in Fijian waters. It has not been established which is most common.