Dave Watts / Striated Fieldwren (Calamanthus fuliginosus) Tasmania, Australia

Andy Trowbridge / Grey warbler / Grey gerygone (Gerygone igata) perched on branch. Christchurch, South Island, New Zealand. May.

Brent Stephenson / Adult female Grey warbler (Gerygone igata) incubating eggs in the dome-shaped nest. Kaikoura, Canterbury, New Zealand, October.

Brent Stephenson / Adult female Grey warbler (Gerygone igata) with nesting material in her bill. Kaikoura, Canterbury, New Zealand, October.

Brent Stephenson / Adult female Grey warbler / Grey gerygone (Gerygone igata) perched in a small shrub searching for food. Tawharanui, Auckland, New Zealand, October.

Brent Stephenson / Adult male Chatham warbler / Chatham Island gerygone (Gerygone albofronta) perched in a small shrub searching for food. Tuku Valley, Chatham Island, New Zealand, November.

Dave Watts / Tasmanian Scrubwren (Sericornis humilis) adult singing. Tasmania, Australia, endemic to Tasmania.

Dave Watts / Brown Thornbill (Acanthiza pusilla) Tasmania, Australia

Dave Watts / Brown Thornbill (Acanthiza pusilla) Tasmania, Australia

Karl Seddon / Australian Reed-Warbler (Acrocephalus australis), Australia

Rob Drummond / Australian Reed-Warbler (Acrocephalus australis), Bairnsdale, Victoria, Australia

Jan Wegener / Australian Reed-Warbler (Acrocephalus australis), Australia