Nest site selection in mountain bluebirds
Published source details
Herlugson C. (1981) Nest site selection in mountain bluebirds. The Condor, 83, 252-255.
Published source details Herlugson C. (1981) Nest site selection in mountain bluebirds. The Condor, 83, 252-255.
This study is summarised as evidence for the following.
Provide artificial nesting sites for songbirdsAction Link
Provide artificial nesting sites for songbirds
A small replicated study in 1976-8 in a mixed forest in Washington State, USA (Herlugson 1981), found that mountain bluebird Sialia currucoides reproductive success (clutch size, eggs number hatched and chicks number) did not differ between two nest box designs. Of 22 marked females that successfully bred, 68% returned to the same territory and nest box type and 71% of those that changed territory selected the same type of nest box. Unsuccessful breeders, however, were more likely to change territory and box type in subsequent years (60% five unsuccessful breeders changed territories, 40% also changed nest box type). The majority of boxes had a 30 x 15 cm base and a 4.4 cm diameter entrance hole 10 cm above the floor; the rest had a 12.7 x 12.7 cm based and a 3.8 cm hole 14 cm above the floor. All were erected 1.5 m above the ground on fence posts and 400 m apart.