"Over 50 bird species include the world's second largest colony (25-30,000) of masked boobies Sula granti (VU), as well as the endangered swallowtailed gull Creagrus furcatus (EN), the Galapagos petrel Pterodroma phaeopygia (CR), and the peregrine falcon Falco peregrinus, Elliot's storm petrel Oceanites gracilis, Hornby's storm petrel Oceanodroma hornbyi, magnificent and greater frigate birds Fregata magnificens and F. minor."