Because they are not vegetable or mineral.
Vertebrates are all the animals classed as birds, mammals, fish, reptiles or amphibians.
Yes. Birds, amphibians, mammals, and reptiles are all animals.
yes
The characteristics include having hair or fur, mammary glands, bear live young and are placental (though monotremes lay eggs and are classed as mammals)
Squirrels are classed as mammals
That depends on the country. They are not classed as zoo animals in Australia.
Echidnas are classed as mammals. Specifically, they are monotremes, or egg-laying mammals. They are classified as mammals despite being egg-layers, because the young suckle mothers' milk. This is the defining characteristic of all mammals. Like most other mammals, they also have fur.
We are mammals, and mammals are one category of animal, so we are both animals and mammals.
Both. Humans are animals in the order Mammalia. All mammals are animals, but not all animals are mammals.
No, all sea animals are not mammals. Fishes are not mammals, but dolphins are mammals.
Nothing is exactly the same. Grizzly bears are similar, but not classed as Marine mammals, as Polar bears are.
Mammals and animals can be the same thing.