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Status, habitat and conservation of the St Helena Wirebird Charadrius sanctaehelenae

Published online by Cambridge University Press:  11 May 2010

M. Neil McCulloch
M. Neil McCulloch
Affiliation:
British Trust for Ornithology, The Nunnery, Thetford, Norfolk IP24 2PU, U.K.
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Summary

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The St Helena Wirebird, a sand plover, is the last surviving endemic bird on the South Atlantic island of St Helena. Census work carried out during 1988–1989 located a maximum of 495 individuals. This is thought to be close to the true size of the population and i s more than 50% higher than the most recent previous estimate. Population trends remain unknown, however. Breeding success appears to be low. A maximum survival rate from egg to independence of 19% was estimated. Predation and disturbance of Wirebirds is discussed. Wirebirds occur in grassland and semi-desert. Highest densities are found in relatively dry, flat pastures. Wetter upland pastures hold few Wirebirds, possibly because of more difficult feeding conditions encountered in taller, denser vegetation on steep slopes. Wirebirds prey on a wide range of invertebrates but beetles and caterpillars appear to predominate in the diet. Possible future threats, principally changes in land-use, were assessed and a management strategy for the species is outlined.

Type
Research Article
Information
Bird Conservation International , Volume 1 , Issue 4 , December 1991 , pp. 361 - 392
Copyright
Copyright © Birdlife International 1991

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