Bairlein et al. 2015
Bairlein F, Fritz J, Scope A, Schwendenwein I, Stanclova G, van Dijk G, Meijer HAJ, Verhulst S & Dittami J 2015.
Energy Expenditure and Metabolic Changes of Free-Flying Migrating Northern Bald Ibis.
PLOS ONE 10(9): e0134433
Migratory birds can perform extraordinarily long flights during migration but the physiological processes that make these feats possible have only recently come into focus. It has generally been assumed that flight has high energetic and physiological costs and that the ability to perform long-distance flights was contingent on the evolution of extraordinary physical adaptations to undertake the journey.
