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Article
C. Randler, AuteurHybridization in birds is a widely acknowledged phenomenon. It often occurs when one species is absent or rare which leads to mixed pairings between different species (Hubb's principle). However, Hubb's principle cannot explain hybridization in [...]
Article
C. Randler, AuteurThe number of hybrids recorded in the field may be biased because these data may simply reflect the detectability of a hybrid pairing. A questionnaire was constructed for assessing the detectability of natural avian hybrids. Ratings from 17 inde[...]
Article
Article
C. Randler, AuteurI examined vigilance behaviour of Mallards (Anas platyrhynchos) feeding in flocks with Greylag Geese (Anser anser) on stubble-fields in northern Germany. I measured scans/min and total scan duration, and I calculated mean scan duration. There wa[...]
