The Galapagos petrel is endemic to the Galapagos Islands, Ecuador (BirdLife International 2000), and is currently known to occur on the archipelago's islands of Santa Cruz, Floreana, Santiago, San Crist[oacute]bal, and Isabela, which cover a total land area of 2,680 square miles (6,942 km\2\, Cruz and Cruz 1987; Vargas and Cruz 2000, as cited in BirdLife International 2000). This species feeds mostly on squid, fish, and crustaceans (Castro and Phillips 1996, as cited in BirdLife International 2000), and has been observed foraging near the Galapagos Islands, as well as east and north of the islands (Spear, et al. 1995). The IUCN classifies the Galapagos petrel as ``Critically Endangered'' (BirdLife International 2006e). The total population is estimated to be 20,000-60,000 birds with a decreasing population trend (BirdLife International 2007e).