Ospreys Pandion haliaetus nesting on artificial platforms have higher reproductive output than those nesting in trees in Canada
This study is summarised as evidence for the following.
Provide artificial nesting sites for raptorsAction Link
Provide artificial nesting sites for raptors
A replicated study in 1978-90 at a lake in Saskatchewan, Canada (Houston & Scott 1992), found that osprey Pandion haliaetus pairs fledged significantly more chicks from nests built on artificial platforms than from those in trees (1.3 chicks/breeding attempt for 70 attempts on platforms vs. 0.9 chicks/attempt for 205 attempts in trees). This difference was due to higher success rates on platforms (63% of 70 attempts on platforms vs. 46% of 205 attempts in trees), with no significant differences between productivities of successful nests (2.1 chicks/nest for 44 successful attempts on platforms vs. 2.0 chicks/nest for 94 successful attempts in trees). Nests were erected between 1978 and 1985 (ten platforms, 33% usage) and 1986-1990 (ten nests, 95% usage) and were made of wood.