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Providing evidence to improve practice

Individual study: Osprey Pandion haliaetus productivity is increased by the provision of artificial nesting platforms in marsh in Maryland, USA

Published source details

Rhodes L.I. (1972) Success of Osprey Nest Structures at Martin National Wildlife Refuge. The Journal of Wildlife Management, 36, 1296-1299

This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Provide artificial nesting sites for raptors Bird Conservation

A before-and-after study at a marshland site in Maryland, USA (Rhodes 1972), found that the number of osprey Pandion haliaetus nests at the site increased from 4-6 before 1968 to 22 in 1971, and chick production tripled, following the erection of 24 artificial nesting platforms in 1968-72. Platforms had an 82% occupancy rate (59 nesting attempts out of 72 available nest-years) and more nests were found on platforms than at natural nest sites (59 nesting attempts on platforms vs. 12 at other sites). Nests on platforms produced an average of 1.3 chicks/nest, whilst natural nests produced 1.8 chicks/nest. Platforms consisted of a 122 x 122 cm platform of planks and wire on a 6.1 m wooden pole. The platform was braced, sunk 150 cm into the ground and designed to withstand hurricane-force winds.