Stephens Island Rockwren Traversia lyalli


Justification of Red List Category
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.

Population justification
No extant population remains.

Distribution and population

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).


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


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).


Text account compilers
Brooks, T., Khwaja, N., Mahood, S.

Recommended citation
BirdLife International (2021) Species factsheet: Traversia lyalli. Downloaded from http://www.birdlife.org on 26/07/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 26/07/2021.