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MICHAEL J. MCGRADY,* WAHEED AL FAZARI, MANSOOR AL JAHDHAMI, MARTIN FISHER, ANDY Y. KWARTENG, HARTMUT WALTER & MADAN K. OLI International Avian Research, Am Rosenh€ ugel 59, Krems 3500, Austria Office for Conservation of the Environment, Diwan of Royal Court, PO Box 246, Muscat, Postal Code 100, Sultanate of Oman Fauna & Flora International, Cambridge CB2 3QZ, UK Remote Sensing and GIS Center, Sultan Qaboos University, PO Box 33 Al Khod, Muscat, Postal Code 123, Sultanate of Oman Department of Geography, University of California, Los Angeles, CA 90095-1524, USA Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL 32611, USA