Dogs and wolves are the same ancestor and the same species. All belong to the canine family.
Canidae (scientific name: Canidae): Canidae has 36 species in 13 genera in the world. Including dogs, wolves, jackals, foxes, etc.
Medium-sized, well-proportioned, with slender limbs and toe mobility, it is conducive to fast running. The head and palate are pointed, the face is long, the nose is prominent, the ears are pointed and upright, the sense of smell is sensitive and the hearing is developed. Canine teeth and cracked teeth are developed; The upper molar has obvious tooth tip, and the lower molar has a small tooth tip and heel tip inside; The diameter of molar crown is larger than the height of lateral incisors; The tooth type is.
the hair is thick and long, generally without patterns. Forefoot 4-5 toes, hind foot generally 4 toes; Claws are thick and blunt, and cannot be extended or slightly extended. The tail is hairy and generally developed. The body structure has evolved into a form especially suitable for hunting life.
He is good at running fast and long distances, likes to live in groups, and often chases for food. Most of them are carnivorous, feeding on herbivores and rodents. Some eat carrion, plants or omnivores. Dog (domestic dog) is one of the earliest domesticated domestic animals. It was first domesticated by gray wolves, jackals and jackals (with multiple origins), and now there are more than 2 breeds. Red fox, arctic fox and raccoon dog are precious fur animals.
Canidae is the most widely distributed family in Carnivora, covering almost all the distribution areas of terrestrial carnivores except a few islands and Antarctica. :
distribution range of Canidae
Canidae is the most widely distributed family in Carnivora, covering almost all the distribution range of terrestrial carnivores except a few islands and Antarctica. Australian wild dogs are the only members of terrestrial carnivores who arrived in Australia before whites.
The breeding mode
depends on the species. After 51-8 days of pregnancy, there are usually about 4-6 cubs born in the kennel. Among carnivores, the Arctic fox has the largest litter size, with an average of about 11, and sometimes more than 2. ?
Arctic foxes give birth in underground caves, hollow logs or trees, hidden clean areas, between boulders or in rock cracks. African wild dogs often give birth in abandoned aardvark caves. Canine breeds at the end of winter, while its young are born in the middle and late spring. Their eyes usually open in about 2 weeks, and each animal takes care of its young for 4-6 weeks.
Smaller canine species can start breeding when they are only one year old, but larger species, such as wolves, do not reach sexual maturity until they are two or three years old.
Subordinate classification
Canidae is divided into three subfamilies: Canine subfamily, Canine subfamily and Fox subfamily. * * * There are 13 genera and 36 species.
Reference:
Baidu Encyclopedia Canidae.