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Detailed species account from European Red List of Birds (BirdLife International 2015)
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BirdLife International (2024) Species factsheet: Razorbill Alca torda. Downloaded from
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Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/11/2024.