Individual study: Pied flycatchers lay larger clutches in larger normal, upright nest boxes
Slagsvold T. (1987) Nest Site Preference and Clutch Size in the Pied Flycatcher Ficedula hypoleuca. Ornis Scandinavica, 18, 189-197
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Provide artificial nesting sites for songbirds
A replicated study from 1980-1984 in 5 sites of spruce, alder or mixed deciduous woodland in Trondheim, Norway (Slagsvold 1987), found that pied flycatchers (Ficedula hypleuca) prefer to nest in larger, upright nest boxes. Pied flycatchers lay larger clutches in larger (base area 180 cm2) rather than smaller (base area 70 cm2) nestboxes (6.4 compared to 6.7 eggs / nest respectively). When nestboxes were of the same small size within a plot, females laid larger clutches in nestboxes placed in normal, upright position than in tilted ones (6.9 compared to 6.3 eggs / nest). Normal, upright nest boxes were used preferentially across sites (80% of nestboxes occupied). There was no difference in fledgling success between nestboxes. Between 15 and 60 artificial nest boxes (diameter of entrance was 32 mm and 15 cm from base of entrance to bottom) were installed in each site each year.