We examined interactions between wolves (Canis lupus) and domestic calves (Bos tauras) within a grazing allotment in central Idaho, USA, to evaluate the role of wolves on calf survival and movements. During the 1999 and 2000 grazing seasons, we radiomarked 231 calves/year-representing 33% of the calf population-on the Diamond Moose Association (DMA) grazing allotment and monitored their survival and movements relative to wolf distribution. Overall, calf survival was high (≥95%), with relatively few mortalities (n = 13) among the marked population. Of the 13 calf mortalities, 8 were unrelated to predation (pneumonia, unknown natural causes, fire), 4 were wolf predation, and 1 was coyote predation. Calves selected by wolves were younger than the surviving cohort by an average of 24 days (wolf-killed: 31 Mar ± 13 days [mean birthdate ± SE], n = 4; live population: 7 Mar ± 1.6 days, n = 207; P < 0.05). Calf movement patterns and group size did not vary relative to the level of spatial overlap with wolves. However, vulnerability to predation appeared to be correlated with spatial proximity of calves to wolf home ranges and rendezvous sites. These results suggest that in our study area, the overall impact of wolves was not significant on either calf survival or behavior.