Laysan Duck
Anas laysanensis
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<birdfyi-bird slug="anas-laysanensis"></birdfyi-bird>No waterfowl has a smaller world range than the Laysan Duck (Anas laysanensis), which survives only on Laysan Island and Midway Atoll in the north-western Hawaiian chain. It is a small dabbling duck, mottled and streaked buff and dark brown, with a white eye-ring standing out against a dark face - reduced in females - and an iridescent speculum. Birds concentrate around a central hypersaline lagoon and its fringing vegetation, taking brine shrimp and brine flies from the lagoon margin. Clutches hold nine to thirteen eggs. The population fell to single figures in the early twentieth century before recovering, and the IUCN Red List still classifies the species as Critically Endangered.
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Sobre
O pato-do-Laysan é um pato dabbling criticamente ameaçado endémico das ilhas havaianas. É um dos patos mais raros do mundo, tendo quase sido extinto no início do século XX devido à introdução de coelhos que destruíram o seu habitat. As populações de reintrodução foram estabelecidas nas ilhas Midway. É notavelmente tame e exibe comportamento de alimentação especializado, incluindo a apanha de moscas nas margens das lagoas salinas.
Physical Description
| Measurement | Value | Imperial |
|---|---|---|
| Envergadura | 39,7 cm | 15.6 in |
| Peso | 465,25 g | 16.41 oz |
Identificação
Plumagem
Brown plumage mottled and streaked buff and dark brown. White eye-ring contrasts with dark face. Both sexes similar; females show reduced white eye ring. Iridescent speculum. Critically endangered; only on Laysan Atoll.
Habitat & Range
Restricted to Laysan Island and Midway Atoll in the Hawaiian Islands. Inhabits the central hypersaline lagoon and surrounding vegetation. Feeds on brine shrimp and flies around the lagoon margin.
Estado de conservação
Comportamento e reprodução
Nidificação
Nest type: CP.
Tamanho da postura
9-13
Som
Canto
Female gives a soft, muffled quacking series; male utters a quiet rasp. Extremely rare; the soft, unobtrusive quacking calls are seldom heard on the remote Laysan Island lagoon.
Taxonomia
| Kingdom | Animalia |
| Phylum | Chordata |
| Class | Aves |
| Ordem | Anseriformes (Waterfowl) |
| Família | Anatidae (Ducks, Geese & Swans) |
| Genus | Anas |
| Espécies | Anas laysanensis |
Distribution
Laysan Duck has been recorded in 5 countries.
countries highlighted
External Databases
Perguntas frequentes
Where does the Laysan Duck live?
Is the Laysan Duck endangered?
How does the Laysan Duck nest?
What does the Laysan Duck sound like?
How big is the Laysan Duck?
What order and family does the Laysan Duck belong to?
Similar Birds
Other species in the Anatidae family