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Providing evidence to improve practice

Action: Use copper strips to exclude snails from nests Bird Conservation

Key messages

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A single small, before-and-after study in Mauritius found no snail-caused chick mortality in 2004–7 after the installation of copper strips at seven echo parakeet Psittacula eques nest holes, compared to four fatalities in 2003–4.


Supporting evidence from individual studies


A small before-and-after study in a forest in Black River Gorges National Park, Mauritius (Tatayah et al. 2007) found that African giant land snails Achatina spp. did not enter seven nest holes used by echo parakeets Psittacula eques between the 2004/5 breeding season and 2007 following the installation of a 50 mm wide strip of copper around the trunk of each occupied tree. Before copper strip installation, four chicks were found dead in two nest holes between 2003 and 2004 due to asphyxiation by snail slime on the snail’s foot.


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.