Alca is a genus of charadriiform bird that contains a single extant species, the razorbill (Alca torda). Many fossil species are known, the oldest dating back to the Miocene. The genus appears to have always been restricted to the North Atlantic.[1]

Temporal range: Miocene - Recent
2015-07-10 Alca torda Dunstanburgh 2.jpg
Razorbill (Alca torda)
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Alcidae
Tribe: Alcini
Genus: Alca
Linnaeus, 1758


  1. ^ Smith, N.A.; Clarke, J.A. (2011). "An Alphataxonomic Revision of Extinct and Extant Razorbills (Aves, Alcidae): A Combined Morphometric and Phylogenetic Approach". Ornithological Monographs. 72: 1–61. doi:10.1525/om.2011.72.1.1.