Abstract
SummaryObservations are given for 25 species of birds seen in southwestern Ecuador or just offshore near the mouth of the Gulf of Guayaquil to supplement the records of Marchant (1958) and Lévêque (1964). Of the 25 species listed, 19 are sea‐birds and a number are species not commonly reported from the area. Two records of the Antarctic Fulmar Fulmarus glacbloides are given, one of which may be the first for Ecuador. The presence of Sooty Terns Sterna fuscata and possibly a few Brown Boobies Sula leucogaster just north of the Santa Elena Peninsula is unusual and was probably the result of an incursion of warm water from the west or north. In May 1966 450 + boobies, 10 Sooty Terns and 350 Brown Pelicans were counted on Isla Pelado (El Viejo) in Bahia de Santa Elena.
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