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Article
Stefan Abrahamczyk, Auteur ; Jörg Liesen, Auteur ; Rudolf Specht, Auteur ; Eva-Christina Katz, Auteur ; Darius Stiels, AuteurCapsule Long-term data on changes in avian diversity from urban habitats are essential to address the ongoing declines in European bird populations.Aims We aimed to analyse historical changes in the bird assemblage of an urban district of Bonn, [...]
Article
Stefan Abrahamczyk, Auteur ; Michael Kessler, AuteurHummingbirds are the most specialised nectarivorous birds and show close ecological relationships to their food plants. Their small body size, bright colors, and unique behaviour have fascinated generations of naturalists. In this review, we inv[...]
Article
Stefan Abrahamczyk, Auteur ; Michael Kessler, AuteurAs for many other taxa, hummingbird diversity declines away from the equator, but the causes for this decline are still disputed and might involve, among others, climatic factors or the availability of food resources. Because hummingbirds are on[...]
Article
Stefan Abrahamczyk, Auteur ; Michael Kessler, Auteur ; Dadang Dwi Putra, Auteur ; Matthias Waltert, Auteur ; Teja Tscharntke, AuteurIn order to assess the potential value of differently managed cacao plantations for bird conservation on Sulawesi, We Surveyed birds in near-primary forest (with limited timber and rattan extraction, and Some hunting), cacao plantations with rem[...]
