The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the gray wolf. Also called the domestic dog, it was selectively bred from an extinct population of wolves during the Late Pleistocene by hunter-gatherers.

Dogs often have jobs including police dogs, army dogs, assistance dogs, fire dogs, messenger dogs, hunting dogs, herding dogs, or rescue dogs. They are sometimes called "canines" from the Latin word for dog - canis. Wolves are also canines. A baby dog is called a pup or puppy. A dog is called a puppy until it is about one year old. [9]

Montage showing the morphological variation of the dog. A dog breed is a particular type of dog that was purposefully bred by humans to perform specific tasks, such as herding, hunting, and guarding. Dogs are the most variable mammal on Earth, with artificial selection producing upward of 360 globally recognized breeds. [1]

This list of dog breeds includes both extant and extinct dog breeds, varieties and types. A research article on dog genomics published in Science/AAAS defines modern dog breeds as "a recent invention defined by conformation to a physical ideal and purity of lineage".

2025年2月21日 · dog, (Canis lupus familiaris), domestic mammal of the family Canidae (order Carnivora). It is a subspecies of the gray wolf (Canis lupus) and is related to foxes and jackals. The dog is one of the two most ubiquitous and most popular domestic animals in the world (the cat is the other).

The dog diverged from a now-extinct population of wolves 27,000–40,000 years ago, before or during the Last Glacial Maximum, [1] [2] when much of the mammoth steppe was cold and dry.. The domestication of the dog was the process which led to the domestic dog.This included the dog's genetic divergence from the wolf, its domestication, and the emergence of the first dogs.

Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

This continues today, resulting in hundreds of dog breeds, some that are similar to each other, and others that are very different. This list includes common breeds, rare breeds, and breeds that are still being developed into new breeds.

2024年8月7日 · For a wider selection of files connected with Dog, see Category:Dog. Images [edit] Anatomy [edit] See also: Category:Dog anatomy. Anatomical structures. Dog skeletons. Dog skulls. Dog teeth. Dog noses. Dog ears. Dog eyes. Odd-eyed dogs (heterochromia) Dog feet. Dog tails. Dogs by color/pattern [edit] See also: Category:Dogs by colour. Black dogs.

2024年10月17日 · English: Dog breeds normally have several different names. To aid in finding pictures this list can be sorted . – In the first column, the name in the region of origin (according to FCI).