| Range Description: |
Milvus milvus is endemic to the Western Palearctic, with the European population of 19,000-23,000 pairs encompassing 95% of its global breeding range1,17. It breeds from Spain and Portugal east through central Europe to Ukraine, north to southern Sweden, Latvia and the UK (890 pairs20), and south to southern Italy. Populations winter within the western breeding range, and formerly in isolated patches south and east to eastern Turkey. It's status as a breeding and wintering species in North Africa is now uncertain. The three largest populations (in Germany, France and Spain, which together hold more than 75% of the global population) all declined during 1990-2000, and overall the species declined by almost 20% over that period1. Eastern German populations declined by 25-30% between 1991 and 1997, but have remained stable since then3,4, whereas in the federal state Saxony-Anhalt the decline continued until 200617. The populations of the northern foothills of the Harz Mountains (the most densely populated part of its range) suffering an estimated 50% decline from 1991-20015. In Spain, the species showed an overall decline in breeding population of 46% for the period 1994 to 2004, and surveys of wintering birds in 2004 suggest a decline of around 50% since 199413; trends that have apparently continued in recent years28. In France, breeding populations have decreased in the northeast, and in the north and east Massif Central, but seem to be stable in southwest and central France and Corsica7,21. Detailed monitoring has not been carried out, but comparing counts from 1980 and 2000 suggests a decline of up to 80% in some areas, during which time the species's range in France decreased by 15%7,8. Following surveys in 2000-2002, the breeding population in France has been estimated at 3,000-3,900 pairs21. A survey in January 2007 indicated that the wintering population in France numbered nearly 6,000 individuals, with most in the Pyrenees21. The Balearic Islands population declined from 41-47 breeding pairs in 1993 to just 10 in 20036. However, conservation actions have since enabled the population to recover, to 38 breeding pairs in 200714. Populations elsewhere are stable or increasing. In Switzerland, populations increased during the 1990s, and have now stabilised12. The population in Belgium was estimated at 100-120 breeding pairs in 2005, following an increase from 1-2 irregular pairs in 196715. In Sweden the species has increased from 30-50 pairs in the 1970s to 1,200 breeding pairs in 20039,10. The rate of increase in Sweden has been recorded as 7.1% annually during 1982-2006 or 13% annually during 1998-2006, depending on the survey method used16; and a rough calculation suggests that Sweden could support 5,000-10,000 pairs once the species has reached carrying capacity24. Since an extreme low during the 20th Century the UK population has increased in recent decades and was estimated to number 1,350 breeding pairs in 200825. This population is still increasing rapidly and a long-term estimate for future carrying capacity is in the order of 10,000 pairs24. Overall, the species population has declined in recent years owing to rapid declines in Iberia for resident breeding birds, and migrants that winter in Spain. Previously the majority of the global population wintered in Spain, but increasingly birds are remaining on their northern European breeding grounds. Those populations that winter outside of Spain are generally increasing. Therefore, while serious declines are expected to continue in southern Europe and therefore in the global population as a whole, as northern populations increase, it is anticipated that their growth will eventually outweigh declines in Iberia.
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