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Eradication of insect pests by several species of songbirds in a mixed pine/oak forest near Ankara, Turkey
(Blackwell Verlag Gmbh, 2002)
Analysis of nestling food in four species of Parus and one species of Ficedula using the 'Halsringmethode' showed a high quota of adults and caterpillars of the important forest pests: Tortrix viridana, Euproctis chrysorrhoea, ...