Keywords
breeding distribution
conservation
Larus atlanticus
Olrog’s Gull
Abstract
We present information on a new colony of Olrog’s Gull Larus atlanticus, endemic to Argentina and internationally considered as vulnerable. The colony, visited on November 16 2001, was on an islet located in the Canal Ancla (38°56'S, 62°11'O), 13 km southeast from Punta Alta. Nests were distributed in four groups of between 17-238 nests, adding to a total of 340 active nests. The Olrog’s Gull colony was located within a colony of Kelp Gulls (Larus dominicanus). Olrog’s Gulls did not breed in this islet during 1995. As this species may change colony sites between breeding seasons, future work should evaluate their spatial and temporal patterns of habitat use.
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