There are a total of 561 Pets and domestic animals that have been compiled and organized in this comprehensive list. The selection includes species commonly kept for companionship, display, or traditional husbandry, plus regionally important domesticates verified from authoritative sources.

Pets and domestic animals are species kept by humans for companionship, food, work, or practical services. They range from companion mammals and birds to livestock, fish, and invertebrates. Many show traits shaped by generations of human care, such as tameness and predictable breeding. They support nutrition, livelihoods, therapy, and cultural practices around the world.

Interesting and little-known facts about Pets and domestic animals:
– Dogs were domesticated at least 15,000 years ago, making them one of the earliest widespread domestic mammals.
– Cats developed a commensal relationship with humans about 9,000 years ago, linked to grain storage in the Near East.
– More than 23 billion chickens are kept worldwide, making chickens the most numerous domestic bird (FAO data).
– Domestication often reduces brain size; many domestic mammals show roughly 10–30% smaller brains than wild ancestors.
– Only a few dozen vertebrate species have reached full domestication; many other animals are kept as pets without full domestication.

The alphabetical index links to A–Z lists that organize every entry by initial letter and essential details. Each list features a sortable table with these columns: common name, scientific name, typical adult size (cm), and classification (Mammal, Bird, Reptile, Fish, Arthropod).