Agreement over the number of spider monkey species is not universal. The fur is somewhat paler than that of the Mexican spider monkey. This is the southernmost population of the brown spider monkey. In species of spider monkey, adult males perform fur rubbing more often than females. However, it comes to the ground more frequently than other spider monkey species. Sounds produced by Geoffroy's spider monkey include barks, whinnies, squeals, squeaks and screams. However, predation of Geoffroy's spider monkey has not been observed by researchers. Geoffroy's spider monkey uses several forms of nonvocal communication. Spider monkey dishes are popular among natives from Southern Mexico. The black-headed spider monkey is arboreal and diurnal. Species in danger of extinction include the jaguar, spider monkey and anteater. Minka's great-great-grandpa who was the first spider monkey in space. When a spider monkey sees a human approaching, it barks loudly similar to a dog. In the corresponding Maya calendar, Howler Monkey (Batz) is substituted for Spider Monkey. Geoffroy's spider monkey was extirpated on Barro Colorado Island in Panama.