Canis

The Canis group is a special family of animals that includes many familiar friends and wild creatures. This group belongs to a larger family known as the Caninae, and it has several species that are still alive today. Some of the most well-known members of this group are wolves, dogs, coyotes, and golden jackals.

Animals in the Canis group are usually medium to large in size. They have strong skulls and teeth, long legs, and shorter ears and tails compared to some other animals. These features help them survive in different environments around the world.

Because of their intelligence and adaptability, many Canis species have lived alongside humans for thousands of years. Dogs, for example, are one of the most common pets today, while wolves and coyotes often live in wild areas. Understanding these animals helps us learn about nature and how different species interact with each other and with people.

Taxonomy

The genus Canis was first described in 1758 by Carl Linnaeus in his book, the 10th edition of Systema Naturae. It includes animals like domestic dogs, wolves, coyotes, and jackals. These animals are closely related and share similar traits, such as having 78 chromosomes and the ability to interbreed.

The group Canis has a long history. Early forms appeared around 43 million years ago, and over time, they evolved into the wolves and coyotes we know today. Some scientists have suggested that certain jackals should be placed in a separate group called Lupulella.

Dentition and biteforce

Dentition is all about how teeth are arranged in the mouth. In animals like wolves and dogs, certain teeth called carnassials act like scissors to help them cut through meat. These special teeth are very important for their eating habits.

Scientists have studied how strong the bite of these animals can be. They found that some, like the extinct dire wolf, had very strong bites. Among living animals, certain types can bite very hard, which helps them hunt bigger animals. The strength of their bite depends on their size and what they usually eat.

Behavior

Canids, such as wolves, coyotes, and jackals, often live in pairs or family groups. These animals work together to hunt and take care of their young. For example, gray wolves hunt in packs to catch large animals like moose.

Studies show that in many canids, females and males form strong pair bonds. In some species, females may try to get more food during certain times, which can affect their mating choices. Dogs, when free to choose, often prefer to mate with dominant males, showing that social status matters in their relationships. Parents, both male and female, take care of their pups, with the level of care changing as the pups grow older. This helps ensure that the young can survive into adulthood.

Coyotes, jackals, and wolves

The gray wolf (C. lupus), the Ethiopian wolf (C. simensis), eastern wolf (C. lycaon), and the African golden wolf (C. lupaster) are four types of animals called "wolves". Smaller members of this group are called coyotes in the Americas and jackals in other parts of the world. Even though these animals may not be as closely related to each other as they are to the gray wolf, they all share a closer family tie with wolves and domestic dogs than they do with foxes, maned wolves, or other canids that are not part of the Canis group. The term "jackal" is used for the golden jackal (C. aureus), which lives in parts of southwestern and south-central Asia, and in the Balkans in Europe.

African migration

The first known member of the Canis group in Africa was found in South Turkwel, Kenya, and lived between 3.58 and 3.2 million years ago. Studies from 2015 showed that many African wolf-like dogs came from Eurasia at least five times during the Pliocene and Pleistocene periods. This matches fossil records that suggest African dog-like animals came from Eurasia, likely due to climate changes between dry and wet periods.

In 2017, scientists found fossils of a new Canis species called Canis othmanii in Wadi Sarrat, Tunisia. These fossils are about 700,000 years old and look more like dogs from Eurasia than those originally from Africa.