The white-headed capuchin sometimes interacts with other sympatric monkey species. White-headed capuchins sometimes travel with and even groom Geoffroy's Spider Monkeys. However, aggressive interactions between the capuchins and spider monkeys also occur. Interactions between the white-headed capuchin and mantled howler are infrequent, and sometimes result in the capuchins threatening the larger howlers. However, affiliative associations between the capuchins and howlers do sometimes occur, mostly involving juveniles playing together.