Domestic dogs and wolves are part of a large taxonomic family of Canidae. According to the Integrated Classification Information System (ITIS), Canidae also includes coyotes, foxes and jackals. Members of this family are called canines. Domestic dog is a subspecies called canine lupus. [Related report: How did a dog become a dog? According to the animal diversity network of the University of Michigan, canines include 34 species belonging to the genus 14. With such a breed, it is easy to understand why there are so many dogs of different sizes. According to the research of the University of Edinburgh, the smallest canine is the Fennech fox. It is only 9.4 inches (24 cm) high and weighs only 2.2 pounds (1 kg). The largest canine is the gray wolf, which is 6.5 feet (200 cm) high and 3 to 5 feet (1 to 1.5 m) long. Their tails increased by 1 to 2 feet. According to the National Wildlife Federation, female dogs usually weigh between 60 and 100 pounds, and male dogs weigh between 70 and 145 pounds.
Habitat Canines are all over the world. Coyotes roam the forests and mountains of North America. According to National Geographic, red foxes live in grasslands, forests, mountains and deserts in the northern hemisphere. Tapirs are distributed in grasslands, deserts and arid grasslands in Africa. Wolves live on every continent in the northern hemisphere.
Canines are used to living in groups and swimming in groups. However, they are very regional, and their territory is marked by smell. According to the African Wildlife Fund, even domestic dogs leave smells in the yard, leaving traces on trees, bushes and objects.
Jackals have poor social skills, and usually go together. Male and female are matched for life, which is very rare for mammals.
Wolves, foxes and other dogs don't howl on the moon. They are actually yelling at each other as a way of communication. Dogs also communicate by screaming, whimpering, barking and growling.
It is a myth that domestic dogs only see black and white. According to a small-scale study of Italian 16 dogs in 20 17 years, they are actually red-green color blind. Marcelo Sinis, a professor of veterinary medicine at Bari University and head of research, said: "If you are going to train your dog to pick up the ball on the green grass in the garden, you can consider using a blue ball instead of a red one." . This is probably because dogs evolved from animals that hunted at dusk and dawn. These animals don't need color vision. Dog: Your best friend is red and green blind.
The facial expressions of domestic dogs are also very expressive, especially when people pay attention to them. According to a study published in Science Report on 20 17,
"These findings seem to support the evidence that dogs are sensitive to human attention, and the expression of dogs is a potential positive communication attempt, rather than a simple emotional expression," Juliane Kaminski, the lead author of the study and a senior lecturer in psychology, said in a statement. Domestic dogs have a unique history-they have lived with humans for 30,000 years, during which the pressure of choice seems to have affected dogs' ability to communicate with us.
Diet Although dogs are omnivores, they mostly eat meat and are natural killers. They have inflexible claws, fast long legs and sharp teeth, which are very suitable for tearing meat. For example, wolves eat deer, livestock, reindeer, beavers, and the life span of dogs varies according to different kinds. The life span of wolves, hyenas, jackals and domestic dogs is 10 years or longer. Vultures, or real foxes, can live for about five years.
Coyotes are scavengers and can eat almost anything. Their food includes bugs, garbage, deer, rodents and snakes. According to National Geographic, they also run very fast, with a speed of 40 miles (64 kilometers) per hour.
The leading males and females are the only two typical breeding species in wolves. Their hierarchy is very strict. A group is usually led by a dominant male.
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Additional resources
Encyclopedia of Life: Canines of University of Illinois at Urbana-Champaign: African Wildlife Alliance: African Wild Dogs