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These birds fly high when the full Moon hangs in the sky

American Black Swift (Cypseloides niger) pair at nest, Montana.

Black swifts on the nest. The northern black swift flies high on moonlit nights — but a total lunar eclipse in 2019 sent them hurrying to lower altitudes. Credit: Donald M. Jones/Nature Picture Library

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Nature 603, 552 (2022)



  1. Hedenström, A. et al. Curr. Biol. (2022).

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