Rakhimberdiev E.; Verkuil Y.; Saveliev A.; Väisänen R.; Karagicheva J.; Soloviev M.; Tomkovich P.; Piersma T.
(2011)
Aim Over the last two decades, thousands of northward migrating ruffs (Philomachus pugnax) have disappeared from western European staging sites. These migratory ruffs were partly temperate breeding birds, but most individuals ...