| Summary: | A strategy to avoid nest predation by various bird species is the selection of inaccessible sites or sites of actual danger for potential predators. In this sense nesting near a top predator may be an effective strategy to avoid nest predation, if this predator does not have a preference for eggs or nestlings of the first species. This note reports the first record of nesting by Plain-mantled Tit-Spinetail (Leptasthenura aegithaloides Kittlitz, 1830) in an active nest of the variable Hawk (Geranoaetus polyosoma Quoy & Gaimard, 1824) and the nesting of the common diuca-finch (Diuca diuca Molina, 1782) nearby, during two consecutive years, in the Atacama Desert, Chile. This occurred during the “flowering desert” phenomenon in October of 2014 and September of 2015. We discuss hypotheses that may explain this biological association and its possible ecological implications.
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