Within its tiny, remote, mid-oceanic range—which also includes Midway and Kure—it is common and conspicuous. The Japan tsunami in 2011 caused a 40% decrease in the population. The Laysan teal (Anas laysanensis) has the most restricted range of any duck species and is especially vulnerable to extinction because of its small population size and vulnerability to climate change.The species was believed to be endemic to one island until new sub-fossil evidence and ancient DNA-testing revealed Laysan teal were widespread across the Hawaiian archipelago. With rabbit and rat eradication, habitat restoration and translocation efforts, the population approached nearly 1,000 birds by 2010 on Laysan and Midway. In 1912 the population consisted of 7 adults and 5 juveniles on Laysan Island.
The duck’s nocturnal and cryptic habits and seasonal differences in their use of the lake contribute to the difficulty of estimating the population size. The Laysan Duck is sometimes called the Laysan Teal due to its small size. The Laysan albatross (Phoebastria immutabilis) is a large seabird that ranges across the North Pacific.The Northwestern Hawaiian Islands are home to 99.7% of the population. In 1911, the Laysan duck population was recorded as less than 20 birds. 1. Birdfinding.info ⇒ After a close brush with extinction the early 1900s, the Laysan Duck fully recovered without direct intervention. Although formerly much more widespread, during its bottleneck the entire global population was confined to Laysan Island. Today there are around 650 individuals. 42 ducks were relocated to Midway Atoll in 2004 and 2005 in an effort to have a second population in the wild. Criteria: B1ac(iv) Click here for more information about the Red List categories and criteria Justification of Red List category This species is listed as Critically Endangered because its population exhibits extreme fluctuations within its extremely small range. Laysan Island is part of the Hawaiian Island National Wildlife Refuge and only scientists have permission to visit the island in an effort to save the Laysan Duck from extinction. The Laysan duck is a difficult species to monitor (Sincock and Kridler 1977). Laysan Duck Population Monitoring . Conservation efforts focus on maintaining the Laysan Duck population on Laysan Island and Midway Atoll and to establish populations on other islands by managing the habitat and reducing the outbreak of avian flu. There are now over 100 ducks living there. As part of an effort to ensure recovery of this endangered species, 42 wild ducks made a 750-mile Pacific voyage from Laysan to Midway Atoll in 2004 and 2005.