Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-29T16:49:17.691Z Has data issue: false hasContentIssue false

Population declines of the endangered endemic birds on Grenada, West Indies

Published online by Cambridge University Press:  11 May 2010

David E. Blockstein
Affiliation:
American Institute of Biological Sciences, 730 11th St. NW, Washington D.C. 20001, U.S.A.
Rights & Permissions [Opens in a new window]

Summary

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The Grenada Dove Leptotila wellsi and the Grenada Hook-billed Kite Chondrohierax uncinatus miruts have each apparently declined since initial surveys in 1987. In a midwinter 1989/1990 census I estimated that there were 75-85 Grenada Doves, compared with 100 in 1987. The 1989/1990 numbers include two small populations not located in 1987. The main population may have declined by 40-50% since 1987. Half as many Hook-billed Kites were seen in 1989/1990 as in 1987 when I estimated the total population to be 15-30. Although seasonal factors may be responsible for some of the differences, destruction of habitat has led to real declines. Unless the prime habitat is protected, extinction of both birds is likely.

Type
Research Article
Copyright
Copyright © Birdlife International 1991

References

American Ornithologists' Union (1983) Check-list of North American birds. Sixth edition. Washington, D.C.: American Ornithologists' Union.Google Scholar
Blockstein, D. E. (1988) Two endangered birds of Grenada, West Indies: Grenada Dove and Grenada Hook-billed Kite. Caribbean J. Sci. 24: 127136.Google Scholar
Blockstein, D. E. and Hardy, J. W. (1989) The Grenada Dove (Leptotila wellsi) is a distinct species. Auk 106: 334340.Google Scholar
Devas, R. P. (1943) Birds of Grenada, St. Vincent and the Grenadines. (Reprinted by Carenage Press, St. George's, Grenada.)Google Scholar
Government of Grenada and Organization of American States (1988) Plan and policy for a system of national parks and protected areas in Grenada and Carriacou. Washington, D.C.: Organization of American States.Google Scholar
Hutto, R. L., Pletschet, S. M. and Hendricks, P. (1986) A fixed-radius point-count method for nonbreeding and breeding season use. Auk 103: 593602.CrossRefGoogle Scholar
King, W. B. (1978-1979) Red Data Book, 2. Aves. Second edition. Morges, Switzerland: International Union for Conservation of Nature and Natural Resources.Google Scholar
Lack, D. and Lack, A. (1973) Birds on Grenada. Ibis 115: 5359.CrossRefGoogle Scholar
Lawrence, G. N. (1884) Characters of a new species of pigeon of the genus Engyptila from the island of Grenada, West Indies. Auk 1: 180184.Google Scholar
Roberts, A. W. P. and Taylor, L. J. (1988) The Grenada Dove expedition. Reading, U.K.: University of Reading unpublished report.Google Scholar
Smith, T. B. and Temple, S. A. (1982a) Feeding habits and bill polymorphism in Hook-billed Kites. Auk 99: 197207.Google Scholar
Smith, T. B. and Temple, S. A. (1982b) Grenada Hook-billed Kites: recent status and life history notes. Condor 84: 131.CrossRefGoogle Scholar
U.S. Fish and Wildlife Service (1987) Endangered and threatened wildlife and plants. U.S. Government Printing Office 50 CFR 17.11 and 17.12.Google Scholar
Wells, J. G. (1886) A catalog of the birds of Grenada, West Indies, with observations thereon. Proc. U.S. Natn. Mus. 9: 609633.CrossRefGoogle Scholar
Wunderle, J. M. (1985) An ecological comparison of the avifaunas of Grenada and Tobago, West Indies. Wilson Bull. 97: 356365.Google Scholar