1. Cartoon animals: Teddy Bear, Garfield Cat, Rascal Rabbit, Tigger, Mickey Mouse, Big-faced Cat, Donald Duck, Pleasant Goat, Big Big Wolf...

2. Animals: raccoons, nine-jointed wolves, guinea pigs, pugs, swallowtail butterflies, four-legged snakes, brine shrimps, great white sharks, white-tip dolphins, sika deer, polar bears, golden monkeys, giraffes, red-crowned cranes, flamingos, Siberian tigers, golden leopards, Dog...

Extended information:

Related extension: History of animals:

According to fossil research, the earliest animals on earth originated from the ocean. After a long geological period, early marine animals gradually evolved into various branches, enriching the early life forms on earth.

Before the emergence of humans, prehistoric animals appeared and flourished during their respective periods of activity. Later, they became extinct one after another under the changing living environment. However, animals on the earth continue to evolve and multiply in a trend from low to high, from simple to complex, and have achieved today's diversity.

Scientists divide existing animals known to humans into two categories: invertebrates and vertebrates based on whether they have spines in their bodies.

Scientists have identified more than 46,900 species of vertebrates. Including fish animals such as carp, yellow croaker, grass carp, reptiles such as snakes and lizards, amphibians such as frogs and salamanders, birds and mammals such as red pandas.

Scientists have also discovered more than 1.3 million species of invertebrates. Most of these animals are insects, and most of the insects are beetles. Slugs, earthworms, squid, oysters, red starfish, jellyfish, spiders, coral polyps, radiolarians, roundworms, pork tapeworms, lugworms, snails, slugs, etc. are all invertebrates.

The bodies of all members of the animal kingdom are heterotrophic organisms composed of cells.