NOTES: BREEDING SEABIRDS OF MORROS EL POTOSÍ, GUERRERO, MEXICO

Abstract

Information on the seabirds of northwestern Mexico has accumulated for several decades now, but seabirds along the country’s southern Pacific coast remain little studied. Morros El Potosí (17° 31′ 57″ N, 101° 29′ 18″ W; known as “White Friars Rocks” in the American navigation literature) consist of three small islands and several rocks 3 km offshore and 15 km east of the city of Zihuatanejo, Guerrero (Figure 1). The main islands are 50–65 m high (Hydrographic Office 1937) and very steep, with vertical cliffs that rise from their faces.