Individual study: Preference of eastern bluebirds Sialia sialis for nest boxes containing old nests at Bluegrass Army Depot, Kentucky, USA
Davis W.H., Kalisz P.J. & Wells R.J. (1994) Eastern bluebirds prefer boxes containing old nests. Journal of Field Ornithology, 65, 250-253
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Clean nest boxes to increase occupancy or reproductive success
A replicated controlled study in 1993 in wooded pasture in Kentucky, USA (Davis et al. 1994), found that eastern bluebirds Sialia sialis preferentially occupied nest boxes containing old nests when given the choice (93% of 41 boxes occupied contained old nests). One hundred boxes were presented in pairs, one empty and one containing an old nest at 50 sites previously used by bluebirds. Boxes had a 10 x 10 cm base and a 2.9 x 10 cm entrance and were erected 1.5 m above ground.