Versuche zur Steigerung der Siedlungsdichte höhlen- und freibrütender Vogelarten und ernährungsbiologische Untersuchungen an Nestlingen einiger Singvogelarten in einem Schadgebeit des Eichenwicklers(Tortrix viridana L.) im Osten von Frankfurt am Main

Foraging Decisions in Starlings (Sturnus vulgarisL.)

“…Kluyver (1933) gathered samples with the neck collar method and estimated that at least 313 species occurred in the diet. Pfeifer andKeil (1958, in Schneider 1972) also used this method, but categorized the number of prey items brought back into 17 groups, some single species, other mixed categories. Dunnet (1955) took photographs of the parent Starlings with prey in their bills, just before they entered the nestbox, and concluded that Leatherjackets and earthworms predominated in the diet.…”

“…Their natural history is described in the next chapter. Tipulids are known to be an important prey species for Starling nestlings in many areas (Dunnet 1955, Kluyver 1933 press) but they are not obligatory (Pfeifer & Keil 1958 to predation by Starlings. An essential ingredient in any foraging study is the measurement of prey density, in practice a difficult undertaking.…”

Differences in the Nestling Diets of Sympatric RedstartsPhoenicurus phoenicurusand Black RedstartsP. ochruros: Species-Specific Preferences or Responses to Food Supply?

“…5). The diet of the Redstart has been studied generally in several types of woods (Pfeifer & Keil 1958, Bösenberg 1960, Mansfeld 1961, Pruska 1980, Dornbusch 1971, Emmrich 1975, whereas most of studies on nestling diet of the Black Redstart have been carried out in towns (Mackrodt 1973, Mey 1974, Nicolai 1992, Krištín & Exnerová 1994, and mountain areas (Munteanu 1969). A comparison of diet from a variety of habitats and localities did not confirm species-specific preferences suggested in our study area.…”