Table 3 Frequency of available and chosen nest boxes (chosen boxes/available boxes) by Pied Flycatchers in an experiment providing conspecific and heterospecific symbols on nest boxes. The experiment was conducted in a tit dominated (tit rich) and a Pied Flycatcher dominated (PF rich) area (Table 1)

From: Nest site preference depends on the relative density of conspecifics and heterospecifics in wild birds