Prooikeuze van Boomvalken Falco subbuteo in Groningen in 1996-2000
De Takkeling , Volume 8 - Issue 3 p. 226- 229
During 1996-2000, prey remains and pellets were collected at plucking posts and on nests of Hobbies breeding in the province of Groningen (NE-Netherlands). This region consists of open farmland and Hobbies occur in low densities, breeding on crow’s nests in electricity towers and in woodlots and hedgerows. Main prey species were House Sparrow, Barn Swallow, Tree Sparrow, House Martin, Yellow Wagtail and Meadow Pipit; these species covered 76% of all vertebrate prey (n=300, consisting of 26 bird species and 1 vole species). The importance of insects as prey could not be determined, but was presumably small (Table 1). Prey choice was proportional to the abundance and distribution of bird species in arable land in the province of Groningen, except for Skylarks which were -given their high breeding density- underrepresented in the prey list. So far, there are no indications that declining prey stocks negatively impacted breeding success of Hobbies in Groningen.
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