Blackie's tracks showed he had unusually large feet for his pounds, so I called him "Bigfoot." There was a marked difference between Blackie's and the other tracks I found in the "bad-lands." The other tracks were those of a grizzly, a fact I determined after collecting evidence for several years, and by sight of the animals themselves. There was a wide difference, too, in the actions of these animals whenever anything unusual happened. Blackie, commonly, ran away without waiting to learn what had caused the alarm. The grizzly displayed extreme caution, usually standing erect on his hind feet, remaining motionless, watching for silent signals of other animals and the birds, swinging his head slowly from side to side, training his high-power nose in all directions, cocking his ears alertly as a coyote. When he located the enemy he slipped away noiselessly, followed a trail with which he was familiar and left the vicinity, perhaps traveling ten or twenty miles before stopping. Unlike Blackie, too, the grizzly was a prodigious worker. No job was too big for him. Often he spent an hour or more in digging out a tiny titbit such as a chipmunk, and several times in his pursuit of a marmot he excavated in rockslides holes large enough for small basements. Daily he traveled many miles, foraging for food as he moved, sometimes eating swarms of grasshoppers, or stowing away bushels of grass or other greenery, or uprooting the ground for dogtooth violets of which he was very fond. Such spots, when he had finished his rooting, resembled a field which the hogs had plowed up. In one respect the black bear and the grizzly were alike: they never seemed to have enough to eat, but had the insatiable appetites of growing boys; never showing any signs of being finicky, but devouring everything edible. Ants, hoppers, chipmunks, marmots and rabbits, comprised their fresh meat; while roots, shoots, bulbs, grass, berries and practically everything growing served for vegetables. They both were inordinately fond of honey. Early one fall the grizzly left his home range and headed for the foothills. More than twenty miles away he found a bee tree, an old hollow cedar which he tore open. He devoured both bees and honey, then went lumbering home. Mountain lions made frequent kills about the region, leaving the carcasses of deer, cattle, horses and burros, which the bears located with their noses or by the flight of birds, and gorged themselves; afterward lying down in some retreat and sleeping long, peaceful hours. It was because of their scavenger habits that they came to be blamed for killing the animals upon which they fed. But not once did I find evidence that they had killed anything larger than a marmot. The grizzly was always working industriously, from dawn to dark, or at night; while Blackie dallied, even though making a "bear living." He preferred to go empty rather than to work for food.