Gulls (Laridae)

Olrog's Gull (Larus atlanticus) - HBW 3, p. 602

French: Goéland d'Olrog German: Olrogmöwe Spanish: Gaviota Cangrejera
Other common names: Simeon's/Band-tailed Gull

Taxonomy: Larus belcheri atlanticus Olrog, 1958, Mar del Plata, Argentina.
Originally described as a race of L. belcheri, but now almost universally considered a distinct species. Monotypic.

Distribution: SE Uruguay (R de la Plata) to Argentina (Puerto Deseado), but breeding known only in Argentina (Buenos Aires, Chubut).