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Documents disponibles écrits par cet auteur (4)
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Article
Cornelia Voigt, Auteur ; Stefan Leitner, Auteur ; Manfred Gahr, Auteur ; Andries Ter Maat, AuteurSinging in tropical and Southern hemisphere birds often occurs throughout the year in the form of duetting, which is thought to be associated with year-round territoriality. White-browed Sparrow Weavers (Plocepasser mahali) are cooperatively bre[...]
Article
Stefan Leitner, AuteurIn songbirds, the differentiation of song and the song control system in the brain is mediated by the action of gonadal steroid hormones that are influenced by environmental factors such as day length, food availability, and social relationships[...]
Article
Stefan Leitner, Auteur ; Peter Mundy, Auteur ; Cornelia Voigt, AuteurThis paper describes size and body condition of individuals in a population of the cooperatively breeding White-browed Sparrow-Weaver Plocepasser mahali in south-western Zimbabwe in relation to the birds' social status within their colony. We un[...]
Article
Christian Dietzen, Auteur ; Cornelia Voigt, Auteur ; Michael Wink, Auteur ; Manfred Gahr, Auteur ; Stefan Leitner, AuteurIsland canaries (Serinus canaria) are characterised as a species living exclusively on North Atlantic islands, mainly on the Azores, Madeira and Canary Islands. Although they are very common in their habitats, their behaviour and breeding system[...]
