Maker of Universes by Philip José Farmer

enormous, wide-winged, green-bodied, red-headed, yellow-beaked eagles. It was crouched on the snake and tearing out gobbets with a beak as sharp as the teeth in the snake’s jaws. Between gulps it glared at Wolff, who tried to shrink even further within the protection of the fissure.
    Wolff had to stay within his crevice until the bird had filled its crop. Since this took all of the rest of the day and the eagle did not leave the two corpses that night, Wolff became hungry, thirsty, and more than uncomfortable. By morning, he was also getting angry. The eagle was sitting by the two corpses, its wings folded around its body and its head drooping. Wolff thought that, if it were asleep, now would be the time to make a break. He stepped out of the crevice, wincing with the pain of stiff muscles. As he did so, the eagle jerked its head up, half-spread its wings, and screamed at him. Wolff retreated to the crevice.
    By noon, the eagle still showed no intention of leaving. It ate little and seemed to be fighting drowsiness. Occasionally it belched. The sun beat down upon the bird and the two corpses. All three stank. Wolff began to despair. For all he knew, the eagle would remain until it had picked both reptile and gworl bare to the bone. By that time, he, Wolff, would be half-dead of starvation and thirst.
    He left the fissure and picked up the spear. This had fallen out when the bird had ripped out the flesh around it. He jabbed threateningly at the eagle, which glared, hissed, and then screamed at him. Wolff shouted back and slowly backed away from the bird. It advanced with short slow steps, rolling slightly. Wolff stopped, yelled again, and jumped at the eagle. Startled, it leaped back and screamed again.
    Wolff resumed his cautious retreat, but this time the eagle did not go after him. Only when the curve of the mountain took the predator out of view did Wolff resume climbing. He made sure that there was always a place to dodge into if the bird should come after him. However, no shadow fell on him. Apparently the eagle had wanted only to protect its food.
    The middle of the next morning, he came across another gworl. This one had a smashed leg and was sitting with its back against the trunk of a small tree. It brandished a knife at a dozen red and rangy hoglike beasts with hooves like those of mountain goats. These paced back and forth before the crippled gworl and grunted in their throats. Now and then one made a short charge, but stopped a few feet away from the waving knife.
    Wolff climbed a boulder and began throwing rocks at the hooved carnivores. A minute later, he wished he had not drawn attention to himself. The beasts clambered up the steep boulder as if stairs had been built for them. Only by rapid thrusting with the spear did he manage to push them back down on the ledge below. The flint tip dug into their tough hides a little but not enough to seriously hurt them.
    Squealing, they landed on the rock below, only to scramble back up toward him. Their boar-tusks slashed close to him; a pair almost snipped one of his feet. He was busy trying to keep them from swarming over him when a moment came when all were on the ledge and none on the boulder. He dropped his spear, lifted a rock twice the size of his head, and hurled it down on the back of a boar. The beast screamed and tried to crawl away on its two undamaged front legs. The pack closed in on his paralyzed rear legs and began eating them. When the wounded beast turned to defend himself, he was seized by the throat. In a moment he was dead and being torn apart.
    Wolff picked up his spear, climbed down the other side of the rock, and walked to the gworl. He kept an eye upon the feeders, but they did no more than raise their heads briefly to check on him before resuming their tearing at the carcass.
    The gworl snarled at Wolff and held its knife ready. Wolff stopped far enough away so that he could dodge if the knife were thrown. A splinter of bone stuck out from the