Andy Trowbridge / South Island robin (Petroica australis australis) perched on moss covered stump. Arthur's Pass National Park, South Island, New Zealand. May.

Andy Trowbridge / South Island robin (Petroica australis australis) perched on snow covered log. Arthur's Pass National Park, South Island, New Zealand. May.

Andy Trowbridge / South Island robin (Petroica australis australis) perched on snow covered log. Arthur's Pass National Park, South Island, New Zealand. May.

Andy Trowbridge / South Island / Yellow-breasted Tomtit (Petroica macrocephala macrocephala) male perched on lichen covered branch. Arthur's Pass National Park, South Island, New Zealand. May.

Andy Trowbridge / South Island / Yellow-breasted Tomtit (Petroica macrocephala macrocephala) male perched on lichen covered branch. Arthur's Pass National Park, South Island, New Zealand. May.

Andy Trowbridge / South Island robin (Petroica australis australis) perched on moss covered stump. Arthur's Pass National Park, South Island, New Zealand. May.

Andy Trowbridge / South Island / Yellow-breasted Tomtit (Petroica macrocephala macrocephala) male perched on top of shrub. Arthur's Pass National Park, South Island, New Zealand. May.

Andy Trowbridge / South Island Robin (Petroica australis australis) perched on stump. Lake Rotoroa, Nelson Lakes, New Zealand.

Andy Trowbridge / South Island robin (Petroica australis australis) perched on forest floor. Lewis Pass, South Island, New Zealand.

Mark Carwardine / New Zealand robin (Petroica australis) male, ringed by researchers, South Island race, Ulva Island, Paterson Inlet, Stewart Island, South Island, New Zealand, June

Mark Carwardine / New Zealand robin (Petroica australis) male, ringed by researchers, South Island race, Ulva Island, Paterson Inlet, Stewart Island, South Island, New Zealand, June

Mark Carwardine / New Zealand Robin (Petroica australis) banded male, Stewart Island, New Zealand

Mark Carwardine / New Zealand Robin (Petroica australis) banded male, Stewart Island, New Zealand

Brent Stephenson / Juvenile South Island robin (Petroica australis) perched on a log on the forest floor. Lake Gunn, Fiordland National Park, New Zealand, February.

Andy Trowbridge / South Island Robin (Petroica australis australis) perched on branch, Inland Kaikoura Range, Marlborough, South Island, New Zealand, April.

Andy Trowbridge / South Island Robin (Petroica australis australis) perched on stump, Kohaihai River, Kahurangi National Park, South Island, New Zealand. January.

Brent Stephenson / South Island robin (Petroica australis australis) male standing on the ground, note the colour bands. Eglinton Valley, Southland, New Zealand.

Brent Stephenson / Female Stitchbird (Notiomystis cincta) feeding North Island Robin (Petroica longipes) chicks. This is the first record of such behaviour for this species, feeding another unrelated species chicks. Tir...

Brent Stephenson / North Island Robin (Petroica longipes / australis) perched sideways on a tree trunk. Tiritiri Matangi Island, Auckland, New Zealand, September.

Brent Stephenson / North Island Robin (Petroica longipes / australis) perched perched on a branch. Tiritiri Matangi Island, Auckland, New Zealand, September.

Brent Stephenson / New Zealand Robin (Petroica australis) perching. Stockton, New Zealand, April.

Mark Hughes / New Zealand Robin (Petroica australis), Karori, Wellington, New Zealand

Mark Hughes / New Zealand Robin (Petroica australis), Wellington, New Zealand

Andrew Walmsley / South Island robin (Petroica australis australis) Arthur's Pass, South Island, New Zealand, March

Andrew Walmsley / South Island robin (Petroica australis australis) Arthur's Pass, South Island, New Zealand, March

Colin Monteath / New Zealand Robin (Petroica australis), Inland Pack Track, Paparoa National Park, New Zealand

Rod Williams / North Island New Zealand Robin (Petroica australis longipes) Tiritiri Is, Hauraki Gulf, North Island, New Zealand, March

Mike Potts / New zealand robin {Petroica australis} with tags, Ulva Island, South Island, New Zealand