Use of free ranging American kestrels and nest boxes for contaminant risk assessment sampling: a field application
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Published source details
Craft R.A. & Craft K.P. (1996) Use of free ranging American kestrels and nest boxes for contaminant risk assessment sampling: a field application. Journal of Raptor Research, 30, 207-212.
Published source details Craft R.A. & Craft K.P. (1996) Use of free ranging American kestrels and nest boxes for contaminant risk assessment sampling: a field application. Journal of Raptor Research, 30, 207-212.
Actions
This study is summarised as evidence for the following.
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Provide artificial nesting sites for falcons Action Link |
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Provide artificial nesting sites for falcons
A replicated trial at nine mixed agricultural sites in Iowa, USA (Craft & Craft 1996), found that American kestrels Falco sparverius occupied 66% of 56 nest boxes for at least one year between 1989 and 1992, with a maximum of 42% occupied in any one year. Clutches contained an average of 4.4 eggs (49 clutches) and 4.2 chicks fledged on average from each successful box (33 boxes, average of 2.7 chicks/box). These values are similar to previously recorded productivities for American kestrels. Four wooden nest boxes were erected in 1988-9 at each site on pylons, windmills, barns or wooden posts. An additional two PVC boxes were erected in 1990 at each site, plus a final two at one of the sites.
