Zapornia palmeri 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Gruiformes Rallidae

Scientific Name: Zapornia palmeri (Frohawk, 1892)
Common Name(s):
English Laysan Rail, Laysan Crake
Porzana palmeri (Frohawk, 1892)
Taxonomic Source(s): Brooks, T. 2000. Extinct species. In: BirdLife International (ed.), Threatened Birds of the World, pp. 701-708. Lynx Edicions and BirdLife International, Barcelona and Cambridge, U.K.
Taxonomic Notes: Zapornia palmeri (del Hoyo and Collar 2014) was previously placed in the genus Porzana.

Assessment Information [top]

Red List Category & Criteria: Extinct ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Brooks, T., Khwaja, N. & Mahood, S.
This species was found in the Northwestern Hawaiian Islands, USA, but is now Extinct. The last population on Eastern Island was exterminated by introduced rats in 1944.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Zapornia palmeri was found on Laysan Island, Hawai'i, USA (Baldwin 1947), from where it became extinct between 1923 and 1936 (Taylor and van Perlo 1998). A similar bird was also seen by Kittlitz on nearby Lisianski Island (Baldwin 1947). Birds were introduced to Pearl and Hermes Reef and to Eastern Island in the Midway Atoll in 1891 and 1913, and from there to Sand Island in 1910, with failed re-introductions also reportedly attempted to Lisianski, Laysan and to the main Hawaiian group (Taylor and van Perlo 1998). However, it became extinct on Pearl and Hermes Reef in 1930, on Sand Island in 1943 and Eastern Island in 1944 (Baldwin 1945).

Countries occurrence:
Regionally extinct:
United States (Hawaiian Is.)
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:No
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No extant population remains.
Additional data:
Continuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:It inhabited grass tussocks and thickets.

Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):2.7
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): It became extinct on Laysan Island as a result of habitat destruction by rabbits and guinea pigs introduced by guano diggers (Taylor and van Perlo 1998). The Pearl and Hermes Reef colony was destroyed by storms; and rats, brought in by wartime activities, exterminated both the Sand Island colony and the Eastern Island colony (Baldwin 1945).

Citation: BirdLife International. 2016. Zapornia palmeri. The IUCN Red List of Threatened Species 2016: e.T22692672A93363618. . Downloaded on 18 July 2018.
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