Cat is a typical small hairy carnivorous mammal. When kept as indoor pets, they are often referred to as indoor cats; when they do not need to be distinguished from other cats and felines, they are often referred to as cats. Cats are often regarded as the ability to accompany and prey on pests. There are more than 70 cat species, although different associations have announced different numbers according to their standards.

The cat is similar to other cats in anatomy. It has a strong body, fast reflexes, sharp retractable claws and teeth suitable for killing small prey. The cat's senses fit into the niche of gap and predatory. Cats can hear voices that are too weak or too high in frequency, such as those made by mice and other small animals. They can see it in near darkness. Like most other mammals, cats have a poor sense of color and a better sense of smell than humans. Although the cat is a lonely hunter, it is a social species, and its communication includes the use of various vocalizations (mowing, hoarseness, trembling, hissing, hissing, growling and cooing), as well as cat pheromones and cat specific body language types.

Cats have a high reproductive rate. Under controlled breeding, they can be raised and displayed as registered pedigree pets, a hobby known as cat fantasy. Due to the inability to control the breeding of pet cats through sterilization and the abandonment of previous family pets, there are a large number of wild cats around the world, which need to control the population. In some areas outside the cat's family, this, together with habitat destruction and other factors, led to the extinction of many birds. It is well known that cats kill birds in specific areas and may lead to the extinction of isolated island populations. Cats are believed to be the main cause of the extinction of 33 species of birds, while the presence of wild and free ranging cats makes some other suitable locations unsuitable for attempts to reintroduce species.

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