In Europe, the breeding population is estimated to number 2,800,000-4,400,000 breeding pairs, equating to 8,400,000-13,200,000 individuals (BirdLife International 2004). Europe forms 25-49% of the global range, so a revised estimate of the global population size is 15,000,000-50,000,000 individuals. del Hoyo et al (1992) estimated the global population to number 8,000,000-32,000,000 individuals. Brooke (2004) estimated the global breeding population to number around 7,000,000 breeding pairs, equating to 21,000,000 individuals. Hence a revised global estimate is 15,000,000-30,000,000.
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