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WatchList Species
Account for Laysan Albatross (Diomedea immutabilis)
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| Photo: © clipart.com |
The Laysan Albatress is the most abundant
species of albatross in the Northern Hemisphere and the second-most
numerous Hawaiian seabird. Its total population is estimated
at 2.5 million. Breeding mostly on atolls in the Hawaiian
Archipelago, it spends July to November widely dispersed in
the north Pacific Ocean. Once falling victim to feather hunters
which decimated colonies and later to military activities
on its breeding islands, it has now begun to nest on islands
off Mexico, including Guadaloupe Island, and on additional
atolls in Hawaii. Its nests are on sandy, grassy areas on
low atolls preferably adjacent to tall vegetation. It breeds
first at 8-9 years and is long-lived, with records up to 51
years. Foods include squid, which makes up the bulk of its
diet, followed by flying fish eggs. crustaceans, and fishes.
The bird feeds by sitting on the water and seizing prey.
Rats prey on the breeding colonies and
even kill adult birds; dogs and possibly the mongoose are
predators on some of the Hawaiian Islands. During and after
World War II many were killed on Midway Island, due to measures
to reduce collisions with aircraft. Thousands of birds also
fall victim to drift nets and longlines. Avian pox spread
by introduced mosquitoes also takes a toll. The largest colony
is on Midway, with over half the total breeding population.
Management to help the birds includes protecting colonies
from dogs and guarding colonies against human intrusion.
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