South Island Wren

Here the details of the South Island Wren named bird below:

SCI Name:  Xenicus gilviventris
Protonym:  Xenicus gilviventris Verh.k.k.Zool.-Bot.Ges.Wien 17 p.316
Taxonomy:  Passeriformes / Acanthisittidae / Xenicus
Taxonomy Code:  soiwre1
Type Locality:  New Zealand [= mountains of South Island] .
Author:  von Pelzeln
Publish Year:  1867
IUCN Status:  Endangered

DEFINITIONS

XENICUS
(Acanthisittidae; Ϯ Bush Wren X. longipes) Gr. ξενικος xenikos  different, strange  < ξενος xenos  stranger; "484. XENICUS, G. R. Gr. 1853.  Acanthisitta, p. G. R. Gr. (Motacilla longipes, Gm.)" (G. Gray 1855). The extremely rare, probably now extinct, Bush Wren was originally considered to be an aberrant warbler; its congener, the Rock Wren X. gilviventris, is an endangered species.
Synon. Pachyplichas, Xenicornis.

xenicus
Gr. ξενικος xenikos  different, strange  < ξενος xenos  stranger.

gilviventris
L. gilvus pale yellow; venter, ventris belly.