Canidae

Canidae is a group of meat-eating mammals. It includes animals like domestic dogs, wolves, coyotes, foxes, and jackals. These animals are called canids. They all have things in common, like long noses, pointy ears, sharp teeth for eating meat, long legs, and bushy tails. Canids live on every continent except Antarctica. Many canids have moved with humans for thousands of years.

Most canids are social animals. They live together in family groups or small packs. Usually, only the leader pair in a group will have babies. They take care of their young together in a hidden den underground. Canids talk to each other using smells and sounds. This helps them stay connected and work together.

One special canid is the domestic dog. Dogs began living with humans during the Upper Paleolithic time. Dogs are now one of the most common domestic animals in the world. They bring joy and friendship to people everywhere.

Taxonomy

See also: List of canids

The Canidae family includes all modern dogs and their closest ancient relatives. It has three main groups. Two groups, called Hesperocyoninae and Borophaginae, are no longer around. The third group, called Caninae, is still here today. All living canids have special teeth that help them chew their food better.

Canids first appeared in North America a long time ago during a time called the Late Eocene. Later, they spread to Eurasia and then to South America. They are part of a bigger group called Caniformia, which also includes cat-like animals called Feliformia.

Evolution

See also: Caninae § Phylogenetic relationships

The Canidae family has about 37 species of dogs and related animals. They range in size from the maned wolf to the small bush dog. These animals live in many habitats around the world, such as forests, deserts, and tundra.

Scientists study how these animals are related by looking at their physical traits and genes. This helps us learn how they evolved over millions of years. Early members of the Canidae family appeared around 40 million years ago. Since then, they have changed and adapted to many different environments.

Characteristics

Wild canids live on every continent except Australasia and Antarctica. They live in deserts, mountains, forests, and grasslands. Their sizes range from the small fennec fox to the large gray wolf.

Most canids have long legs and bodies for running, with bushy tails and fur that changes with the seasons.

All canids look similar, with long muzzles and special skull shapes. They walk on their toes and have noses and padded feet. Most have five toes on their front feet and four on their back feet. Their teeth help them cut and crush food, with special teeth called carnassials that shear meat. Most canids have 42 teeth, but some species have fewer.

Life history

Most canids are social animals and live together in groups. They usually have a home range and sleep outside, using dens only for having babies or bad weather. In many foxes and dogs, a male and female pair work together to hunt and raise their young. Larger canids like gray wolves live in groups called packs. These packs can be quite large.

Canids talk to each other using smells, body language, and sounds like growls, barks, and howls. They mark their area with urine and special smells from glands. Most canids are monogamous, and both parents help take care of their young. The mothers are attractive to males during a special time, and after mating, they have a pregnancy that lasts from 50 to 65 days depending on the species. The babies, called pups, are born blind and helpless and stay in a den for safety. Both parents and sometimes other pack members help feed the pups. Young canids take about a year to grow up and learn how to survive.

Canids and humans

Further information: Dog

The domestic dog was the first animal to live with humans. Evidence shows that dogs were buried with people long ago, suggesting they lived together even earlier. This partnership likely began when humans were hunter-gatherers.

Wolves, who live in packs, may have formed bonds with humans because of their teamwork and loyalty. Humans valued dogs for their alertness and ability to help track animals, while dogs may have gained access to food.

Some canid species, like the dhole, are now endangered due to loss of habitat.