Abstract
Fasola, M., Hafner, H., Prosper, J., van der Kooij, H. & V. Schogolev, I. 2000. Population changes in European herons in relation to African climate. Ostrich 71 (1 & 2): 52–55. We describe population changes for six heron species, which have occurred during the past three decades in five areas of southern and central Europe. We seek correlations in the population levels between areas and between species, and we test the relationship between breeding population and climate during the preceding winter in Africa, where some of these herons overwinter. We conclude that population levels of European herons are influenced by local conditions more than by factors acting on a wide geographic scale, and that hydrological conditions in sub-Saharan Africa during winter have significant but limited effects on breeding populations of herons in Europe.
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