Swallow-tailed gull and hunting over the open oceans, and migrating eastward to the coasts of Ecuador and Peru. The swallow-tailed gull is unique among the gulls in feeding exclusively nocturnally, mostly on fish and squid which rise to the surface at night to feed on plankton. It leaves the colony as a flock at dusk, with a great deal of screaming and display. Calls and displays are quite different from other gulls, most resembling the vocalisations of the black-legged kittiwake and Sabine's gull. The loudest and most commonly heard call is an alarm referred to as "rattle-and-whistle", a gurgling scream made with
Fork-tailed storm petrel Fork-tailed storm petrel The fork-tailed storm petrel ("Oceanodroma furcata" or "Hydrobates furcatus") is a small seabird of the storm petrel family Hydrobatidae. It is the second most abundant and widespread storm petrel (after the Leach's storm petrel) and is the only bird in its family that is bluish-grey in colour. The fork-tailed storm petrel is pelagic, spending up to 8 months in the northern Pacific ocean. They only return to land to breed, where they nest in a colony. Their nest can be found in a rock crevice or small burrow where a single egg is laid. Their breeding range