Annual variation in numbers, age and sex ratios among migrating raptors at Falsterbo, Sweden from 1986–1995

Abstract

The annual variation in age and sex ratio among raptors passing the Falsterbo peninsula, Sweden was studied the ten autumns 1986–1995. The analysis encompasses thirteen species with average annual totals of between 25 and 14,000 migrants. In general, raptors occurring in low numbers showed the greatest relative annual variation. One explanation for high… (More)
DOI: 10.1007/BF01651225

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