It depends on the mammal, but most nurse less time than humans. Animals in the wild have to fend for themselves quickly.
Never. Ducks aren't mammals.
Yes, they do nurse them. All mammals nurse their young. Guinea pigs are mammals. They will nurse them for about 6 weeks after birth.
Only mammals nurse their babies.
Mammals have hair and nurse their young. That's what makes them mammals.
Yes, as they are mammals, they nurse their young with milk.
Penguins are not mammals, but they are birds. Penguins lay eggs, they do not have fur and they do not nurse their young as mammals do.
Mammals, are warm-blooded vertebrates that nurse their young and are covered with hair.
Because they nurse their young.
Sometimes.
No. Although abertosaurus may have cared for its young it did not nurse them. Only mammals nurse their young.
No, only mammals can nurse. Moths are insects and therefore do not produce milk.
Fish do not give live birth, most mammals do. Fish do not nurse their young, mammals do.