A comparison of passerine migration in southern and northern Israel |
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| Institution: | 1. Dead Sea and Arava Science Center, Yotvata 88820, Israel;2. Israel Heritage Department and the Department of Land of Israel Studies and Archaeology, Ariel University, P.O.B. 3, Ariel 4070000, Israel;3. Centre for Development and Environment, University of Bern, Bern 3012, Switzerland;4. Department of Geography, Bar Ilan University, Ramat Gan 52900, Israel;1. Department of Psychology, University of California, Berkeley, CA, USA;2. The Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA;1. Department of Forest and Wildlife Ecology, University of Wisconsin-, Madison, 1630 Linden Drive, Madison, WI 53706, USA;2. Friends of Wildlife, No. 14, Thitsar Road, Yankin Township, Yangon, Myanmar;3. Smithsonian Conservation Biology Institute, Conservation Ecology Center, 1500 Remount Road, Front Royal, VA 22630, USA |
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| Abstract: | In Israel, a well-known avian migratory bottleneck, there is a temporal and geophysical divide in the flyways. The migration at Eilat, at the southern tip of Israel, is disjunct from the flyway in central and northern Israel. In order to elucidate the differences between the two flyways, we compared the data collected simultaneously at the Kfar Ruppin ringing station in northern Israel, and in the IBRCE Bird Sanctuary in Eilat at the southern tip of Israel. We chose the three most common species that are typical long distance, trans-Saharan, passerine migrants: Blackcap (Sylvia atricapilla), Lesser Whitethroat (Sylvia curruca) and Reed Warbler (Acrocephalus scirpaceus). At both ringing stations, the number of migrants recorded in spring was considerably greater than in autumn for all three species. Individuals from all species analysed in both passage seasons at Kfar Ruppin had longer wings than in Eilat, and in spring all three species were heavier in Kfar Ruppin. Our study is the first to show that there are biometric differences within Israel and stress the need to study the eastern migratory flyway of the Western Palaearctic in order to fully understand the intercontinental movements of the EurAsian migratory passerine populations. |
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