| geophagy in chacma baboons: patterns of soil consumption by age class, sex, and reproductive state. | despite baboons' widespread distribution across africa, geophagy among all subspecies has been poorly documented. we used video camera traps and soil analyses to investigate geophagy in chacma baboons (papio cynocephalus ursinus) inhabiting the western cape of south africa. during an 18-month study, from august 2009 to january 2011, we continually monitored the largest and most frequently visited geophagy sites with camera traps for 545 days and captured soil consumption at one or more sites on ... | 2012 | 21969111 |