Yosemite nature notes . from cast by AI. V. HouJ Sierra black bear tracks. Front foot, left, hindfoot, right. Six-inch pencil will bed down in some secluded spot fromwhich they can quietly slip away if dis-turbed. They are good tree climbers, and climbboth large and small trees apparentlywith equal ease, the main requirementbeing a tree of sufficient size to supportthe bears weight, even though it tee-ters. Bears habitually follow a given route,stepping each time in the footsteps pre-viously made. Trails have been found in. Bear den in oak tree. Museum of Vertebrate Zoology 86 YOSEMITE NATURE
Yosemite nature notes . from cast by AI. V. HouJ Sierra black bear tracks. Front foot, left, hindfoot, right. Six-inch pencil will bed down in some secluded spot fromwhich they can quietly slip away if dis-turbed. They are good tree climbers, and climbboth large and small trees apparentlywith equal ease, the main requirementbeing a tree of sufficient size to supportthe bears weight, even though it tee-ters. Bears habitually follow a given route,stepping each time in the footsteps pre-viously made. Trails have been found in. Bear den in oak tree. Museum of Vertebrate Zoology 86 YOSEMITE NATURE NOTES Yosemite where they have stepped in thesame tracks as their predecessors, until aseries of alternating depressions nearlysix inches in depth have developed. Other signs left by bears, besides foot-prints, consist of bear wallows, rottenlogs and stumps ripped apart in thesearch for insects, turned-over rocks,droppings, and bear trees. These bear trees are of interest, par-ticularly when the trees happen to bequaking aspen, for they permanently re-cord the marks left by bears. Arrivingat such a tree, the bear usually stops,and, standing erect on its hind legs,reaches up as high as possible, biting andscratching the tree. The reason for thisaction is not definitely known, althoughwriters have suggested that it may besome type of social register. The black bear, being the largest mam-mal in the park, has practically no nat-ural enemies. The largest bear is generallythe boss of his domain until a still largerone co
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnatural, bookyear1922
