Abstract
In June 2019 we found a nest of Eurasian Tree Sparrow Passer montanus in a nest of Red Kite Milvus milvus. It contained five chicks and was located on the side of the kite nest. The nests were located 17 m above ground in a pine tree in a small pine woodland within farmland in western Poland. We believe that this is the first record of Eurasian Tree Sparrow breeding in a Red Kite nest. Our observation supports the notion of great adaptability and flexibility in selection of nest site reported by other authors, who have found Eurasian Tree Sparrow nest in large twig nests of several species.
Highlights
While surveying birds of prey and Northern Raven Corvus corax within a study plot, we found a Eurasian Tree Sparrow Passer montanus nest in the foundation of a Red Kite nest
One of us (MP) found that the calls came from a nest with five young of Eurasian Tree Sparrow (Figure 1)
We observed adult Eurasian Tree Sparrows near their nest, but none of them was alarmed by our presence
Summary
While surveying birds of prey and Northern Raven Corvus corax within a study plot, we found a Eurasian Tree Sparrow Passer montanus nest in the foundation of a Red Kite nest. One of us (MP) found that the calls came from a nest with five young of Eurasian Tree Sparrow (Figure 1). We observed adult Eurasian Tree Sparrows near their nest, but none of them was alarmed by our presence.
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