Plasma metabolites of three migrant bird species during nocturnal endurance flight

Plasma metabolites of the fat-, protein and carbohydrate metabolism were analysed in European robins, garden warblers and pied flycatchers during their nocturnal migration on a Swiss Alpine pass, Col de Bretolet. Birds were caught in high mist nets out of their nocturnal flight; hence the plasma metabolites reflect the metabolism of a flying, fasting bird.