There are many groups of animals. Here are a few: The cat family, The dog family, Sea creatures, Birds, Amphibians, and reptiles.
He divided animals into two groups- those with red blood and those without it.
Vertebrates and invertebrates.
Elephants and bees are two animals that have a female as the leader.
Vertebrates and Invertebrates
Plants and animals
Aristotle subdivided his two groups of animals based on their blood. He classified animals as either having blood (vertebrates) or not having blood (invertebrates).
There are two groups of animals that are called a bed. Oysters and clams are both called beds when they are in groups.
Mammals & birds.
fungi & animals
Porifera(sponges) and Nematoda(roundworms).
The two main groups of living things are- a) Plants b) Animals
birds and fish are 2 :)