Robinson, Scott K. (1997). "Birds of a Peruvian Oxbow Lake: Populations, Resources, Predation, and Social Behavior". Ornithological Monographs. 48 (Studies in Neotropical Ornithology Honoring Ted Parker): 613–639. doi:10.2307/40157558. JSTOR40157558.
Robinson, Scott K. (1997). "Birds of a Peruvian Oxbow Lake: Populations, Resources, Predation, and Social Behavior". Ornithological Monographs. 48 (Studies in Neotropical Ornithology Honoring Ted Parker): 613–639. doi:10.2307/40157558. JSTOR40157558.