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Article
Wolfgang Winkel, Auteur ; Doris Winkel, AuteurDrost (1936) categorized the breeding plumage of male Pied Flycatchers (Ficedula hypoleuca) into seven colour types with a variation which ranges continuously from dorsal completely black (type I) to fully brown or greyish brown (type VII). This[...]
Article
Wolfgang Winkel, Auteur ; Doris Winkel, AuteurStudies about nestbox roosting of birds in winter were carried out from 1988/89 to 1999/2000 in a research area with 370 nestboxes in Lower Saxony. Besides Nuthatches, Great Tits, Blue Tits, and Tree Sparrows a female Lesser Spotted Woodpecker w[...]
Article
Wolfgang Winkel, Auteur ; Doris Winkel, AuteurIn numerous study areas near Braunschweig/Lower Saxony data of Nuthatches, breeding in artificial nestboxes, were recorded since the early 1950s. In 2004 the first evidences of second broods for this region could be established. In botl cases of[...]
Article
Wolfgang Winkel, Auteur ; Doris Winkel, AuteurIn a nestbox study plot near Lingen (52.27 N, 7.15 E M in western Lower Saxony/Gerany a consistent increasing of Pied Flycatcher breeding pair density was established from 1974 to 1997. This is discussed in relation to the "border situation" of [...]
Article
Wolfgang Winkel, Auteur ; Doris Winkel, Auteur ; Thomas Lubjuhn, AuteurIn the present paper we report about a pair of blue tits (Parus caeruleus) with a clutch of 19 eggs from which 17 young fledged. The nestlings were reared during the breeding season 2002 in a small-sized nestbox of a study area near Brunswick (5[...]
Article
Wolfgang Winkel, Auteur ; Doris Winkel, AuteurThe mean hatching success of 1838 Pied Flycatcher clutches recorded from 1974 to 1999 amounts to 94.7% (without clutches destroyed by predators). Totally hatching failure was only found in six broods ( = 0.3% of all broods recorded). A sterile m[...]
Article
Wolfgang Winkel, Auteur ; Doris Winkel, AuteurWe found a Coal Tit pair breeding successfully in the hole of an iron tube of a path-barrier although the tube with the nest inside was constantly raised up from horizontal to vertical position when the barrier was opened.
