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The razorbill (*Alca torda*) is a species of bird within the family Alcidae and order Charadriiformes. Classified under the class Aves and phylum Chordata, it belongs to the genus *Alca*. The species was described by Linnaeus in 1758 and is currently accepted as a valid taxon. Its conservation status is listed as Least Concern by the IUCN Red List, a designation recorded in 2021.

This marine organism has a wingspan of 0.661. While its taxon range is noted as Africa, the species is not extinct. Other common names for the razorbill include Álka, Alke, and Tordalk.