The prevalence of 2 species of pharyngeal bot flies parasitizing sympatric wild ungulates from southern Spain is given. Pharyngomyia picta was found in all red deer and fallow deer whereas Cephenemyia auribarbis was found in 59% of fallow deer and 81% of red deer examined. The mean number of P. picta larvae was 3-6 times more than that of C. auribarbis larvae. These data suggest that red deer are more heavily parasitized than fallow deer and that they are predominantly infested with P. picta larvae.