Where does the black bear in Tokyo hibernate?


  The photos below show the hibernation sites of radio-tracked bears. Bears hibernate in tree hollows, holes in the ground dug at the base of large snags or stumps, caves, etc., but perhaps because of the scarcity of large trees in Okutama Mountains, they often use holes in the ground or caves. One of the unusual sites for hibernation found previously is the ruin of an oven for charcoal.
 
Photo1: A male in hibernation den Photo2: A male in hibernation den
Photo: The hibernation den a 70 kg male.
(In the snag of a Sawashiba exposed on the slope)
Photo: The hibernation den of a 74 kg male.
(A hollow in the Tsuga trunk)
Photo3: A male in hibernation den
Photo:  The hibernation den of a 54 kg male.
(A hollow in the Fir trunk)

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