Foraging ecology of the Santa Marta Parakeet (Pyrrhura viridicata) in the San Lorenzo Ridge, Santa Marta Mountains. - We studied foraging behavior, diet composition, and diet variation in the Santa Marta Parakeet (Pyrrhura viridicata), an endemic species from Colombia listed as endangered (EN). We documented the use of 11 plant species between July and December of 2006 on the San Lorenzo Ridge, in the Santa Marta Mountains. The most frequently consumed species were Croton aff. bogotanus (Euphorbiaceae) (18.8%), Sapium sp. (Euphorbiaceae) (18.8%), and Lepechinia bullata (Lamiaceae) (15.91%), and we found a restricted diet composition in periods when these resources were used. Niche breadth apparently responded to changes in food abundance, suggesting that the species exhibits ecological flexibility. The species showed high group cohesion during foraging and searching strategies. Foraging maneuvers depended on the plant consumed and specific parts of the plant selected. Like other congeners, this species appears to be polyphagous and ecologically flexible, although it has a stereotyped behavior in evolutionary terms. The use of altered vegetation for foraging could facilitate conservation.