Pied flycatchers Ficedula hypoleuca prefer to nest in clean nest boxes in a montane deciduous forest in La Hiruela, Madrid, Spain
This study is summarised as evidence for the following.
Clean nest boxes to increase occupancy or reproductive successAction Link
Clean nest boxes to increase occupancy or reproductive success
A replicated, controlled study in 1993-4 in two areas of montane oak Quercus pyrenaica forest in the Community of Madrid, Spain (Merino & Potti 1995), found that pied flycatchers Ficedula hypoleuca preferentially nested in nest boxes which had no old nesting material in them, although this preference was only significant in 1994 (approximately 75% of clean nest boxes occupied vs. 18-50% of boxes with old material inside). The authors note that 55% of the boxes with old nests in were completely cleaned in 1993, suggesting an aversion to old nesting material. In 1993, nest material was removed from all boxes before being replaced in 20 boxes (leaving 39 clean); in 1994, nest material was removed from 17 boxes, with 13 left with old material inside.