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Documents disponibles écrits par cet auteur (9)
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Article
Sandra Hodić, Auteur ; Pablo Vera, Auteur ; Pedro Marin Prado, Auteur ; Wouter M.G. Vansteelant, Auteur ; Leo Zwarts, Auteur ; Jocelyn Champagnon, AuteurAfro-Palearctic migrant populations are declining in Europe, and non-breeding conditions in Africa have been shown to be important in determining the population size of long-distance migrants. Overwintering conditions and prenuptial migration ma[...]Nouveauté
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Simone Santoro, Auteur ; Jocelyn Champagnon, Auteur ; Sergey P Kharitonov, Auteur ; Leo Zwarts, Auteur ; H Dieter, Auteur ; Manuel Manez, Auteur ; Boudjema Samraoui, Auteur ; Riad Nedjah, Auteur ; Stefano Volponi, Auteur ; Santiago Cano-Alonso, AuteurThe Glossy Ibis is among the most widespread bird species in the world. However, the Glossy Ibis erratic occurrence and distribution makes it a difficult species to study, and we know little about its dispersal and metapopulation dynamics. This [...]
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Leo Zwarts, Auteur ; Rob G. Bijlsma, Auteur ; Jan Van Der Kamp, AuteurArboreal birds tend to remain in woody vegetation and avoid crossing open areas. Therefore, few tree-dwelling birds are to be expected in scattered trees. We tested this expectation with field data collected in the deserts, savannas and open agr[...]
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Leo Zwarts, Auteur ; Rob G. Bijlsma, AuteurFor a study of long-distance migrants in sub-Saharan Africa, a census method was developed that combined precision and accuracy regarding bird numbers and tree choice. The number of birds present in trees and shrubs can be counted accurately,. a[...]
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Leo Zwarts, Auteur ; Rob G. Bijlsma, Auteur ; Jan Van der Kamp, Auteur ; MARTEN Sikkema, Auteur ; Eddy Wymenga, AuteurIn West Africa, tree preferences of wintering migratory birds (and African residents) were quantified in order to assess the importance of wintering conditions on distribution, abundance and trends of insectivorous woodland birds. This study enc[...]
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Leo Zwarts, Auteur ; Jan Van der Kamp, Auteur ; Erik Klop, Auteur ; MARTEN Sikkema, Auteur ; Eddy Wymenga, AuteurMangrove forests attract many insectivorous birds. Bird density in West African mangroves in January-March 2014 is higher in Avicennia (21 birds/ha canopy) than in Rhizophora (11 birds/ha). The Palearctic species are dominant in the most norther[...]
Article
John D. Goss-Custard, Auteur ; Leo Zwarts, AuteurWhen sampling the intertidal macro-invertebrate food supply of wading birds Charadrii, cores of sediment have been taken to depths of 15-30 cm or even more. But for a variety of reasons, samples are often taken to
Article
Leo Zwarts, Auteur ; Jan H. Wanink, Auteur
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Leo Zwarts, Auteur ; Jan Van der Kamp, Auteur ; Otto Overdijk, Auteur ; Tom Van Spanje, Auteur ; Ronnie Veldkamp, Auteur ; Rodney West, Auteur ; Mick Wright, Auteur
