Barred owls Strix varia use nest boxes across the USA
Published source details
Johnson D.H. & Follen Sr. D.G. (1984) Barred owls and nest boxes. Raptor Research, 18, 34-35
Published source details Johnson D.H. & Follen Sr. D.G. (1984) Barred owls and nest boxes. Raptor Research, 18, 34-35
This study is summarised as evidence for the following.
Provide artificial nesting sites for owlsAction Link
Provide artificial nesting sites for owls
A short 1984 review of several nest box programmes in the USA (Johnson & Follen Sr.. 1984) found that barred owls Strix varia appeared to successfully use nest boxes provided in a range of habitats. Owls nesting in nest boxes in Minnesota produced more chicks than those in natural nests (2.75 fledglings/nesting attempt for 12 attempts in nest boxes vs. 2.00 fledglings/nesting attempt for six attempts in natural nests); in Wisconsin, two nest boxes produced ten chicks over four years; in Michigan, a single box produced young in three of the four years it was monitored (1979-82). Boxes varied in design, but most were modified wood duck boxes, approximately 33 x 34 x 36 cm, with 18-22 cm entrance holes.