Attributes / relations provided by
♦ ¹Feeding and General Activity Patterns of a Howler Monkey (Alouatta palliata) Troop Living in a Forest Fragment at Los Tuxtlas, Mexico, Alejandro Estrada, Saúl Juan-Solano, Teresita Ortíz Martínez and Rosamond Coates-Estrada, American Journal of Primatology 48:167-183 (1999)
♦ ²Feeding Ecology of the Black Howler Monkey (Alouatta pigra) in Northern Belize, S.C. SILVER, L.E.T. OSTRO, C.P. YEAGER, AND R. HORWICH, American Journal of Primatology 45:263–279 (1998)
♦ ³"Fig-eating by vertebrate frugivores: a global review", MIKE SHANAHAN, SAMSON SO, STEPHEN G. COMPTON and RICHARD CORLETT, Biol. Rev. (2001), 76, pp. 529–572
♦ ⁴Flexibility in Diets of Three Species of Costa Rican Primates, Colin Chapman, Folia primatol. 49: 90-105 (1987)