Canidae is a family of dog-like animals divided into two main groups: Canini (dogs, wolves, and jackals) and Vulpini (foxes). The Canidae family includes 34 species. The smallest canid is the Fennec Fox (Vulpes zerda); it weighs only around 1.2 kg (2.7 lbs). The largest one is the Grey Wolf (Canis lupus), which can weigh up to 80 kg (176 lbs).

A canid species everyone is familiar with is the Domestic Dog (C. lupus familiaris). Domestic dogs are descendants of wolves. Dogs have been domesticated for thousands of years, and today, they are the most popular pets worldwide.

Canids are incredibly adaptable to a wide variety of environments; they can be found on all continents except Antarctica. The Fennec Fox is native to the Sahara Desert, the Maned Wolf (Chrysocyon brachyurus) can be found in South America and the Arctic Fox (Vulpes lagopus) lives in the harsh Arctic tundra. The Dingo (Canis lupus dingo) is a canid native to Australia.

Most canids have a strong sense of smell and acute hearing, which help them search for food. Canids prey primarily on mammals and birds, but they are omnivorous and can also eat fruits, vegetables, and grains.

Many canid species live in packs; some examples are wolves and African wild dogs. Canid packs have a complex hierarchical system that helps them hunt and care for each other to survive. However, some canids, such as foxes, are more solitary.

Canids are vital for the ecosystems they live in. Most canids are apex predators or key scavengers. They ensure the balance of the ecosystems by regulating the populations of herbivores. Canid scavengers clean up carcasses, reducing the spread of disease and returning nutrients to the ecosystem.