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Avifaunistische Beobachtungen im Westchentej
This paper reports the results of bird observations at four study sites with many different habitats in the western Chentej-mountains (forest steppe, taiga) at the end of the spring-migration and theExpand
Über die Federmerkmale der mongolischen Sakerfalken Falco cherrug milvipes im Vergleich zu den westlichen Sakerfalken der Unterart F. ch. cherrug und Bemerkungen über die Gefiedermerkmale
The different plumage characteristics of the Mongolian Saker Falco cherrug milvipes and the nominate race F. ch. cherrug are discussed. It could be shown that both races are polymorphic. According toExpand