Overview
Key Features:
The Laysan Albatross is two-toned, with a dark back and white belly and head, which distinguishes the Laysan from other albatrosses.
Similar Species:
Black-footed Albatross (Phoebastria nigripes)
Primary Common Name:
Laysan Albatross
Synonymous name(s):
Diomedea immutabilis
General Grouping:
Seabirds and shorebirds
Geographic Range:
Northern Pacific Ocean, from Japan to Alaska to California
The Laysan Albatross ranges widely across the northwestern and northeastern Pacific, from Japan to Alaska to California, usually far offshore, at least 20 to 30 km during nonbreeding months (July – October). In Monterey Bay their numbers peak in January and February.
Habitats:
Continental shelf, exposed rocky shore, exposed sandy beaches
Notes:
Open and exposed, sandy coast for breeding purposes only. Well offshore when not breeding.
Abundance:
Relative Abundance:
Phoebastria immutabilis breeds at 16 sites (nine with populations of greater than 100 pairs), mostly in the Northwestern Hawaiian Islands, with additional small colonies in Japan and Mexico. The population is estimated to be 1,180,000 with 590,900 breeding pairs. The largest colony is at Midway Atoll, where 71% of the world's population nests, followed by Laysan Island, also in the Northwestern Hawaiian Islands. The population at monitored colonies increased between 1980 and 1995 but has never reached the numbers observed prior to large-scale harvests for feathers in the early 1900s. There was a 32% decline during 1992-2002 (3.2% per annum) of birds breeding on the Northwestern Hawaiian Islands, though data from 2004 and 2006 indicate that the breeding population then rebounded, and that the overall population trend for 1992-2005 is stable. In January 2008, 452,609 breeding pairs of Laysan Albatross were nesting on the three islands of Midway (Sand: 274,043, Eastern: 176,561; Spit: 2,005). A population began nesting in Mexico in the 1980s and has been increasing since then. In 2003 the Laysan Albatross was classified as 'Vulnerable' by the IUCN using information from the Hawaiian Islands showing declines of at least 30 percent over three generations.
Species Description:
General:
Albatrosses are distinguished from all other seabirds by their large size, long slender wings, large bills (102 to 113 mm/4 to 4.5 in), and their soaring, steady flight with seemingly endless gliding. When sitting on the water they lose their graceful appearance and float like a giant gull. Albatrosses cannot take off in calm air but must run across the surface of the water, into the wind to become airborne. This is also true of the time they spend on land, needing to run across the sand into the wind, flapping madly to gain altitude. The Laysan Albatross is usually easy to identify and separate from the other albatrosses because of coloration: upper wings, mantel, back, upper rump and tail are blackish-grey. The head, lower rump and underparts are white. Adults have a blackish smudge around the eye. The bill is pinkish-yellow with a grey hooked tip, legs are a light grey and feet are webbed and pale pink. The ventral side of the fairly narrow wing is white with black margins and variable amounts of black on the underwing coverts. The juveniles are similar except their bill is more grey and there is no white in the upper rump. The Laysan Albatross is approximately 81 cm. long (32 inches) with a wing span of about 208 cm (82 inches). It weighs approximately 6.6 lbs (3,000 grams). It is slightly smaller and slimmer than the Black-footed Albatross.
Distinctive Features:
Phoebastria immutabilis has a blackish-grey back, mantel, upper wings, upper rump and tail with white head, lower rump, and underparts. Pinkish-yellow bill with grey tip, blackish smudge around eye, legs and feet grey to pale pink. In flight it soars for long periods without wing beats.
Size:
The Laysan Albatross measures approximately 81 cm (32 inches) in length and has a wingspan of 198 to 216 cm (78 to 89 inches). It weighs 2.7 to 3.2 kg (6 to 7 pounds).
Natural History:
General:
The Laysan Albatross is an open ocean species, coming to land exclusively to breed in October and then incubating, brooding and raising a chick from November until June. It is an annual breeder, though like other albatross species, each year a portion of birds will skip a breeding season. Adults care for their single chick from hatching in February or March until June or July when the chick is old enough to survive on its own.
Nests vary from a simple scoop in the sand to more elaborate nests where vegetation allows. Its lifespan varies from 12 to 40 years usually, although a 55 year old Laysan Albatross has been recorded breeding (USFWS unpublished data).
The largest colony of Laysan Albatrosses is at Midway Atoll in the Hawaiian Islands National Wildlife Refuge and numbered over 450,000 pairs in 2008.
Predator(s):
The only known native predator of Black-footed and Laysan Albatrosses in Hawaii is the tiger shark (
Galeocerdo cuvieri), which preys upon fledglings during their first incursions to sea. The endemic Clarion Raven (
Corvus corax clarionensis) and the Clarion Racer (
Masticophis anthonyi) may be significant predators on Clarion Island, Mexico (Bill Henry pers. comm.).
Invasive Predators
Non-native mammalian predators (e.g., dogs, cats, pigs, mongooses, and rats) limit the size and productivity of several breeding colonies and may restrict the reoccupation of some historical sites. On the main Hawaiian Islands, feral and domestic cats and dogs kill albatrosses, and few if any of these colonies would be viable without predator control programs such as fencing and trapping (USFWS 2005). Big headed ants are also a threat to young chicks.
Prey:
The Laysan Albatross feeds in pelagic waters, mainly on flying fish (Exocoetidae) egg masses and adults, and secondarily squid (Order Teuthoidea). It will also consume crustaceans, other invertebrates and carrion. It has been described as a floating pig by one author for its habit of taking kitchen scraps from ships. It will also consume floating debris, including plastics.
Feeding Behavior:
Carnivore, Omnivore, Scavenger
Notes:
The Laysan Albatross seizes prey while floating on the surface (i.e. it does not dive into the water while in flight as pelicans do) or by making a shallow surface dive. The Laysan Albatross, having high levels of rhodopsin in its retina, is primarily a nocturnal feeder, seizing prey at the surface, taking almost anything that floats, or making a shallow surface dive. They will follow ships to eat anything that is discarded. They scavenge at pelagic gillnets and steal bait from longlines