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Flying fox in flight. Flying fox species vary in body weight, ranging from 120–1,600 g (0.26–3.53 lb). Across all species, males are usually larger than females. [11] The large flying fox has the longest forearm length and reported wingspan of any bat species, [3] but some bat species exceed it in weight.
Fox species differ in fur color, length, and density. Coat colors range from pearly white to black-and-white to black flecked with white or grey on the underside. Fennec foxes (and other species of fox adapted to life in the desert, such as kit foxes), for example, have large ears and short fur to aid in keeping the body cool.
The fennec fox (Vulpes zerda) is a small fox native to the deserts of North Africa, ranging from Western Sahara and Mauritania to the Sinai Peninsula. Its most distinctive feature is its unusually large ears, which serve to dissipate heat and listen for underground prey.
Diagram of a typical insect leg. The typical and usual segments of the insect leg are divided into the coxa, one trochanter, the femur, the tibia, the tarsus, and the pretarsus. The coxa in its more symmetrical form, has the shape of a short cylinder or truncate cone, though commonly it is ovate and may be almost spherical.
The muscle deep to (underneath) the pectorals is the supracoracoideus, or the pectoralis minor. It raises the wing between wingbeats. Both muscle groups attach to the keel of the sternum. This is remarkable, because other vertebrates have the muscles to raise the upper limbs generally attached to areas on the back of the spine.
They vary in size from the fennec fox, which may be as little as 24 cm (9.4 in) in length and weigh 0.6 kg (1.3 lb), [20] to the gray wolf, which may be up to 160 cm (63 in) long, and can weigh up to 79 kg (174 lb). [21] Only a few species are arboreal—the gray fox, the closely related island fox [22] and the raccoon dog habitually climb trees.
Juvenile red foxes are known as kits. Males are called tods or dogs, females are called vixens, and young are known as cubs or kits. [14] Although the Arctic fox has a small native population in northern Scandinavia, and while the corsac fox's range extends into European Russia, the red fox is the only fox native to Western Europe, and so is simply called "the fox" in colloquial British English.
The Bengal fox is more daintily built than the red fox (V. vulpes), and can readily be recognized by its bushy, black-tipped tail, which is around 50–60% of the length of the head and body. [7] The backs of the ears are dark brown with a black margin, and white inside.