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Résumé :
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On 11 July 2006, the former Reserved Zone of Tumbes (ZRT), situated at the border to Ecuador in extreme north-western Peru, was declared national park. This paper compiles the updated bird list for the area from previous literature and from personal fieldwork. It shows chronologically the recent discoveries for Peru. Biological field data are provided for some rare and overlooked species. For the first time, it analyses altitudinal preferences, abundance and seasonality of all birds. The analysis reveals that the ZRT has 1) the second highest number (53) of endemic bird species in the world and probably the highest for just one locality, 2) the highest biodiversity of bird species (254) west of the Peruvian Andean watershed and 3) the highest number of new country records of bird species for Peru (26) in the last
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