Pīwauwau / Rock wren

Xenicus gilviventris

Threatened - Nationally Endangered

Tiny, tough and totally flightless, the pīwauwau, or rock wren, is Aotearoa’s true alpine survivor. Found only in the high-altitude rockfields of the South Island, these small, bouncy birds endure freezing temperatures and snowy winters by sheltering in crevices and foraging in harsh terrain. Their presence is a sign of a healthy, predator-free alpine environment.

Quick Facts:

• The rock wren is New Zealand’s only true alpine bird and cannot fly – it hops and flits among boulders.
• Its Māori name pīwauwau means “little complaining one,” referring to its high-pitched calls.
• Despite their size, they remain active in snow and sub-zero conditions – a rare trait for any songbird.
• Rock wrens can’t resist a good feather. Soft, warm and rare in the alpine zone – they’re the perfect nesting material. Scientists sometimes use that love of feathers to track down hidden nests.
• Extremely vulnerable to introduced predators like stoats, particularly during nesting season.

Safeguarding pīwauwau means controlling predators in remote, mountainous habitats – a crucial step in protecting our most rugged native species.

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