Stout-legged wren


The stout-legged wren or Yaldwin's wren is an extinct species of New Zealand wren, a family of small birds endemic to New Zealand.

History and etymology

The holotype is a right tarsometatarsus collected on 29 September 1983 from the Honeycomb Hill Cave. The specific epithet honours Dr John Yaldwyn, Director of the National Museum of New Zealand in Wellington, in recognition of his contributions to avian palaeontology.

Description

It was the largest of the New Zealand wrens. The morphology of the wren indicates that it was strongly adapted to a terrestrial existence. Radiocarbon dates for the assemblages with which it is associated range from 25,000 BP to 1,000 BP. Either flightless or nearly so, it became extinct following the occupation of New Zealand by the Polynesian ancestors of the Māori, and the associated introduction of the kiore.

Distribution and habitat

The subfossil remains of the wren have only been found in the South Island of New Zealand, and it seems to have formed a species pair with the closely related P. jagmi, which was only found in the North Island. Since it has been found in association with four other species of acanthisittids in four genera it is likely that its ecological niche was different enough for it to have coexisted with them. Sites where it was found indicate that it inhabited lowland mixed podocarp broadleaf forest, ranging upwards into alpine tundra scrubland.