Initiation of feeding by four sympatric Neotropical primates (Ateles belzebuth, Lagothrix lagotricha poeppigii, Plecturocebus (Callicebus) discolor, and Pithecia aequatorialis) in Amazonian Ecuador: Relationships to photic and ecological factors. - Snodderly DM; Ellis KM; Lieberman SR; Link A; Fernandez-Duque E; Di Fiore A (PloS one, 2019)