This paper is a first attempt to investigate the variability in reindeer-procurement strategies in Upper Palaeolithic sites by means of sex ratios, as reflected by osteometrical data. For this purpose the “Variability Size Index” method is employed. The idea behind the analysis is that sex ratios in reindeer (but also in red deer and in bovids) were mainly determined—as they are in modern populations—by the reproductive biology of the animals and not by environmental conditions. Thus, any deviations from these ratios must be explained in terms of behavioural/cultural variables. The faunal material for the study comes from sites in southwest France, Switzerland and southern Germany. During the Upper Palaeolithic females dominate in all assem...