Extreme altitudes during diurnal flights in a nocturnal songbird migrant

Sjöberg S, Malmiga G, Nord A, Andersson A, Bäckman J, Tarka M, Willemoes M, Thorup K, Hansson B, Alerstam T & Hasselquist D

Science. 2021. Volym 372, sid(or) 646-648. https://doi.org/10.1126/science.abe7291