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Bighorn sheep corral traps relied on a deep understanding of bighorn sheep behavior. The Tukudika built traps in the Wind River Range and the Abaroka Range which where shaped in spirals (shaped something like a bighorn sheep horn) with the opening to the trap facing downhill. The traps were located on slopes near bighorn sheep summer range. Hunters would approach the sheep from above, then spook the animals downhill. Since sheep have an instinct to find security at high ground, the sheep would run downhill, then traverse the sloped, before running uphill again. With luck, this movement of the animals would direct them straight into the mouth of a corral trap, usually constructed out of logs. The hunters would then spook the animals further into the narrowing part of the spiral trap, with the assistance of a ceremonial leader stationed in a pod along one of the corral walls. At the end of the trap, the sheep would run up a ramp into an elevated cattle-guard-like trap, with widely spaced timbers. They would fall off the timbers, with their feet hanging into air. Thus immobilized, the hunters would kill the sheep with clubs, spears, or projectiles. Some of these traps were used through the 1800s, with the remains still visible in the late 20th century. Tukudika also hunted sheep by driving them into deep drifts of spring snow.