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Providing evidence to improve practice

Action: Provide artificial nesting sites for oilbirds Bird Conservation

Key messages

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A before-and after-study in Trinidad and Tobago found an increase in size of an oilbird colony following the creation of artificial nesting ledges.


Supporting evidence from individual studies


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.


Referenced papers

Please cite as:

Williams, D.R., Child, M.F., Dicks, L.V., Ockendon, N., Pople, R.G., Showler, D.A., Walsh, J.C., zu Ermgassen, E.K.H.J. & Sutherland, W.J. (2019) Bird Conservation. Pages 141-290 in: W.J. Sutherland, L.V. Dicks, N. Ockendon, S.O. Petrovan & R.K. Smith (eds) What Works in Conservation 2019. Open Book Publishers, Cambridge, UK.