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This study presents data on mortality events of the species Alca torda in the central region of Portugal and data was also used to improve reporting of species biometrics in wintering grounds. A total of 646 razorbills were collected between Aveiro and Praia de Santa Rita (central coast of Portugal) from January to April of 2012, 2013, 2014 and 2016. This species is listed as Near Threatened and population...
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