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Article
Ernst Kniprath, AuteurQuatre couvées de quatre femelles différentes de l'Effraie des clochers Tyto alba, provenant de sites distants de 600 km, ont montré des œufs orientés verticalement pendant presque toute la période d'incubation. Une rotation autour de l'axe long[...]
Article
Ernst Kniprath, Auteur ; Susanne Stier-Kniprath, AuteurKniprath E & Stier-Kniprath S 2011: Circumstances of mate change for a second brood in the Barn Owl Tyto alba. Vogelwarte 49: 75-77Before deciding for a second brood with their previous male barn owl females obviously regularly test whether ther[...]
Article
Ernst Kniprath, Auteur ; Beatrix Wuntke, Auteur ; Horst Seeler, Auteur ; Reinhard Altmuellier, AuteurFor all four study areas in northern Germany the authors found that egg laying has been advanced for 0,43 to 0,87 d per year. This is interpreted as reaction to the global warming. An English translation of the paper is available at www.kniprath[...]
Article
Horst Seeler, Auteur ; Ernst Kniprath, AuteurWithin 3 years a female barn owl had 5 successful broods with 5 different males and moved between all broods. For a better judgment of the circumstances of the divorces the origin of the males, their fate after the divorce and also the origin of[...]
Article
Ernst Kniprath, Auteur ; Reinhard Altmueller, Auteur ; Horst Seeler, Auteur ; Susanne Stier, AuteurIn contrast to an earlier suggestion in the german literature and in full accordance to banding results in the UK for Tyto a. alba and in the USA for Tyto a. pratincola it is shown for Tyto a. guttata in northern Germany, that young males reach [...]
Article
Ernst Kniprath, Auteur ; Susanne Stier, AuteurThe underparts colouration of 318 breeding Barn Owls was investigated. In the 9, the distribution among 5 colouration types is non spectacular and has its predominant peak at the type "guttata" In the male, not only the lighter types ("alba") ar[...]
