Early hunter-gatherers in North America spent significant time and energy to secure a reliable food supply. One means of doing so involved the use of large-scale traps—rock and/or wood features constructed through group or communal effort to trap or ambush migrating artiodactyls such as bighorn sheep or pronghorn antelope. Designed to concentrate large numbers of prey animals for easier slaughter, large-scale traps also open an important window for the study of prehistoric social patterns ...