Figure 9. This infant is nursing while being groomed by his mother. Infant baboons are completely dependent upon their mother for the first year of life. Over the 47 years of the Amboseli baboon study, only a handful of infants whose mothers died in their first year of life have survived to adulthood. Even after weaning (at approximately 16 months of age) the loss of the mother has a negative effect on juvenile survival. Photo credit: Chelsea Weibel.