(Tetraonidae; Ϯ Willow Grouse L. lagopus) L. lagopus, lagopodis  ptarmigan  < Gr. λαγωπους lagōpous, λαγωποδος lagōpodos  ptarmigan, rough-footed like a hare  < λαγως lagōs  hare; πους pous, ποδος podos  foot; "Pedibus plumosis. .  . .Lagopus. Genus 5.  ...  Genus Lagopodis  ...  Crura ad calcaneum usque plumosa  ...  Pedes plumosi. Calcaribus carent hujus generis Aves" (Brisson 1760): based on "Lagopus" of Willughby 1676, Sibbald 1684, Ray 1712 and Klein 1750; "Lagopus Brisson, Orn., 1, 1760, p. 26, 181. Type, by tautonymy, Lagopus Brisson = Tetrao lagopus Linné." (Peters 1934, II, 29).
Var. Lagophus, Logopus.
Synon. Acetinornis, Attagen, Keron, Oreias.
● (syn. Buteo Ϯ Ferruginous Hawk B. regalis) Specific name Falco lagopus Pontoppidan, 1763; "Mr. L. Fraser laid upon the table three new species of Birds, which he described as   LAGOPUS FERRUGINEUS  ...  Upper surface dark brown, mottled slightly with white on the head and neck; tail above the basal half white, terminal brown, totally white beneath  ...  Hab. Mexico.  ...  There are three specimens of this bird in different stages of plumage in the Society's collection, all from Mexico." (Fraser 1844).

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2018). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2018). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 14 December 2018).