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

  • David E. Blockstein (a1)

Summary

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.

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Copyright

References

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American Ornithologists' Union (1983) Check-list of North American birds. Sixth edition. Washington, D.C.: American Ornithologists' Union.
Blockstein, D. E. (1988) Two endangered birds of Grenada, West Indies: Grenada Dove and Grenada Hook-billed Kite. Caribbean J. Sci. 24: 127136.
Blockstein, D. E. and Hardy, J. W. (1989) The Grenada Dove (Leptotila wellsi) is a distinct species. Auk 106: 334340.
Devas, R. P. (1943) Birds of Grenada, St. Vincent and the Grenadines. (Reprinted by Carenage Press, St. George's, Grenada.)
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.
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.
King, W. B. (1978-1979) Red Data Book, 2. Aves. Second edition. Morges, Switzerland: International Union for Conservation of Nature and Natural Resources.
Lack, D. and Lack, A. (1973) Birds on Grenada. Ibis 115: 5359.
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Smith, T. B. and Temple, S. A. (1982a) Feeding habits and bill polymorphism in Hook-billed Kites. Auk 99: 197207.
Smith, T. B. and Temple, S. A. (1982b) Grenada Hook-billed Kites: recent status and life history notes. Condor 84: 131.
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.
Wells, J. G. (1886) A catalog of the birds of Grenada, West Indies, with observations thereon. Proc. U.S. Natn. Mus. 9: 609633.
Wunderle, J. M. (1985) An ecological comparison of the avifaunas of Grenada and Tobago, West Indies. Wilson Bull. 97: 356365.

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

  • David E. Blockstein (a1)

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