The weeper capuchin (Cebus olivaceus) is distributed in semi-evergreen forests of northern South America and is found in Brazil, Venezuela, and the Guianas. Body length is about 50 cm, weight 2–3 kg, and the tail is comparable to the body length and is used wrapped around branches for support. Diurnal, it feeds on fruit, seeds, insects, and small animals, and usually spends time in the lower and mid forest strata but also forages on the ground, for example by overturning stones. It forms multi-male multi-female groups of around 20 individuals, led by a dominant male. Breeding is concentrated mainly from October to February; gestation is about 145–170 days, typically producing a single young that is weaned in a short period. Conservation status: Least Concern.