The Iucn Red List

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Birds of Conservation Concern 5

www.bto.org

increases the list to nine bird species. Man and second IUCN Red List assessment of It is not all bad news. Thanks to successful reintroduction projects, the white-tailed eagle moves from the Red to Amber list. Song thrush, redstart also moved off the Red list to Amber, but the first three species remain close to the Red list threshold.

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What is Biodiversity - Unesco

www.unesco.pl

Of the 47,677 species in the International Union for Conservation of Nature (IUCN) Red List of Threatened Species of 2009, 17,291 are deemed to be at serious risk3. The list reveals that 21 per cent of all known mammals, 30 per cent of all known amphibians, 12 per cent of all known birds, 28 per cent of reptiles, 37 per cent of freshwater

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100 OF THE WORLD’S WORST INVASIVE ALIEN SPECIES

portals.iucn.org

The list of “100 of the World’s Worst Invasive Alien Species” that is presented here is designed to en-hance awareness of the fascinating complexity, and also the terrible consequences, of invasive alien species. Species were selected for the list according to two criteria: their serious impact on biological diversity and/or human activities,

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