Our final two "most endangered canines" come to us from the fox family.

The IUCN calculated in March that 27,159 species are threatened, endangered or extinct in the wild out of nearly 100,000 species biologists examined in depth. Sure enough, the fox they stumbled across was this thought-to-be-extinct fox, a Sierra Nevada red fox (Vulpes vulpes necator). Lions, hyena, hawks, and owls are the natural predators of these animals. The Smilodon (saber-toothed cat) lived in North and South America at the end of the last glacial period, though it evolved as a separate species around 2.5 million years ago.

Foxes live on every continent except Antarctica. Breeds of tamed foxes include fennec, red, corsac, arctic and gray foxes; they range in size, temperament and physical characteristics. A variety of fox species are kept as exotic pets, tamed for living with humans on human terms.
The largest subspecies, Smilodon populator, could reach 400 kg in weight, three meters in length, and 1.4 meters tall at the shoulder. How the Sierra Nevada Red Fox Was Found & Identified Photographs of the fox were taken by a Forest Service trail camera near Sonora Pass and showed the fox biting a bait bag of chicken scraps. First up is the critically endangered Darwin's fox (Lycalopex fulvipes).

Its habitat is (or was) the island of Cozumel, Mexico.
Sharing your home and life with a fox … The Channel Islands, off the coast of Southern California, are the only home of a species of tiny fox that looks like a plush toy. The nocturnal Cape fox is an omnivorous species which feeds on fruits, insects, small mammals, and birds.

Cozumel fox (extinct/critically endangered species) Cozumel foxes are a fox species of the genus Urocyon, slightly smaller than a common gray fox but larger than an island fox. The newly discovered species is about the size of a large male red fox (Vulpes vulpes) and about 20 percent larger than living and late Pleistocene arctic foxes. Twelve species belong to the monophyletic "true foxes" group of genus Vulpes.Approximately another 25 current or extinct species are always or sometimes called foxes; these foxes are either part of the paraphyletic group of the South American foxes, or of the outlying group, which consists of the bat-eared fox, gray fox, and island fox.

4. Vulpes riffautae is an extinct species of fox of the genus Urocyon.

It lived during the Pleistocene.

They had the coloration of a gray fox (silver tipped gray fur, black stripe on the tail, orange chest and belly with white areas).