This study analyses faunal assemblages from the Agate Basin and Clary Ranch sites in the Great plains, reinterpreting existing ideas about diet and subsistence patterns during the Ice Age. Matthew Hill posits logistically planned hunting and seasonal settlement strategy, with evidence for more intense processing of carcasses and restructuring of settlement/subsistence strategies in the Late Palaeolithic to accommodate longer and more intense late-winter-early-spring food resource bottlenecks.