An update of the breeding distribution, population status and conservation of the Olrog's Gull (Larus atlanticus)

Abstract

In this paper we update the breeding distribution, population size and conservation status of the Olrog's gull (Larus atlanticus). Its known breeding distribution is extended 140 km north and 640 km south. with colonies at Isla Brightman, Buenos Aires province, and Islas Vernaci. Chubut province respectively. We report 5 breeding colonies, all of them located on islands. and three of which are described for the first time. We estimate the total population size in 1220 ± 127 breeding pairs. We discuss the implications of the survey results for the conservation of this species.