Conservation Evidence strives to be as useful to conservationists as possible. Please take our survey to help the team improve our resource.

Providing evidence to improve practice

Individual study: Providing nest ledges for oilbirds Steatornis capripensis increases colony size in a cave at the Asa Wright Nature Center, Trinidad

Published source details

Lambie I. (1993) Good news about oilbirds. Bellbird, 2, 1993-1993

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 oilbirds Bird Conservation

A before-and after-study at a colony of oilbirds Steatornis capripensis nesting in a cave at the Asa Wright Nature Center, Trinidad (Lambie 1993), found that the population increased from 25-30 birds to more than 100 individuals and 43 nests by 1977 following the installation of  artificial concrete ledges in 1967-1968. Before this, the colony appeared limited in size by the 15 or 16 ledge nest sites available. In 1977, 21 of the nests were on artificial ledges.