Traversia lyalli 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Passeriformes Acanthisittidae

Scientific Name: Traversia lyalli
Species Authority: (Rothschild, 1894)
Common Name(s):
English Stephens Island Wren
Xenicus lyalli lyalli Sibley and Monroe (1990, 1993)
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.

Assessment Information [top]

Red List Category & Criteria: Extinct ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Symes, A. & Butchart, S.
Facilitator/Compiler(s): Brooks, T., Khwaja, N. & Mahood, S.
This species is known from Stephens Island, New Zealand, but became Extinct in 1895. A combination of development on the island and predation by introduced cats is thought to have driven its decline.
Previously published Red List assessments:
2008 Extinct (EX)
2004 Extinct (EX)
2000 Extinct (EX)
1994 Extinct (EX)
1988 Extinct (EX)

Geographic Range [top]

Range Description: Traversia lyalli is only known from recent times from Stephens Island, New Zealand (Greenway 1967), although it is common in fossil deposits from both of the main islands (Worthy and Holdaway 1994). It was extinct by November 1895, but it had survived into that year, with Travers finding a cat-caught specimen in February (Tennyson and Martinson 2006).

Countries occurrence:
Regionally extinct:
New Zealand
Continuing decline in area of occupancy (AOO): Unknown
Extreme fluctuations in area of occupancy (AOO): No
Estimated extent of occurrence (EOO) - km2:
Continuing decline in extent of occurrence (EOO): Unknown
Extreme 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.

Habitat and Ecology [top]

Habitat and Ecology: The species was flightless and restricted to the rocky ground (Millener 1989).

Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Unknown
Generation Length (years): 3.5
Movement patterns: Not a Migrant

Threats [top]

Major Threat(s): Construction of a lighthouse on Stephens Island in 1894 led to the clearance of most of the island's forest, with predation by the lighthouse keeper's cat delivering the species's coup-de-grace (Tyrberg and Milberg 1991).

Citation: BirdLife International. 2012. Traversia lyalli. The IUCN Red List of Threatened Species 2012: e.T22698593A39504442. . Downloaded on 30 November 2015.
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