The only population of rock wrens (Xenicus gilviventris) known to exist outside the Southern Alps is found here.    From Wordnik.com.  [Southland temperate forests] Reference

An endemic family of passerines, the Xenicidae, is represented by rock wren Xenicus gilviventris and rifleman Acanthisitta chloris.    From Wordnik.com.  [Te Wahipounamu (South-West New Zealand World Heritage Area), New Zealand] Reference

The endemic rock wren (Xenicus gilviventris) and the world's only alpine parrot, the kea (Nestor notabalis) probably evolved from lowland equivalents.    From Wordnik.com.  [Southland montane grasslands] Reference