They are primarily crepuscular, hunting during the hours of twilight, but become more active in the day during the mating season. They are good climbers of cliffs and trees. These burrows are commonly made more secure by being dug among tree roots. Sables live in burrows near riverbanks and in the thickest parts of woods. However, when resources are scarce they may move considerable distances in search of food, with travel rates of 6 to 12 kilometres (3.7 to 7.5 mi) per day having been recorded. They defend home territories that may be anything from 4 to 30 square kilometres (1.5 to 11.6 sq mi) in size, depending on local terrain and food availability. Sables inhabit dense forests dominated by spruce, pine, larch, Siberian cedar, and birch in both lowland and mountainous terrain.

Behaviour Ī Japanese sable, as illustrated in The Illustrated Natural History, 1865 Their skulls are similar to those of pine martens, but larger and more robust with more arched zygomatic arches. Sables greatly resemble pine martens in size and appearance, but have more elongated heads, longer ears and proportionately shorter tails.

The fur is softer and silkier than that of American martens. Individuals also display a light patch of fur on their throat which may be gray, white, or pale yellow. Japanese sables (known locally as クロテン or kuroten) in particular are marked with black on their legs and feet. Different subspecies display geographic variations of fur colour, which ranges from light to dark brown, with individual coloring being lighter ventrally and darker on the back and legs. The winter pelage is longer and more luxurious than the summer coat. Females have a body length of 35–51 centimetres (14–20 in), with a tail length of 7.2–11.5 centimetres (2.8–4.5 in). Illustration from Brehm's Life of Animals

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