Rob Drummond/ BIA / Black-faced Woodswallow (Artamus cinereus), South Australia, Australia

Rob Drummond/ BIA / White-browed Woodswallow (Artamus superciliosus) male, Victoria, Australia

Roger Powell / Black butcherbird (Ctracticus quosi) perched, Darwin, Northern Territory, Australia

Martin Willis / Black-faced Woodswallow (Artamus cinereus), Mount Isa, Queensland, Australia

Greg Oakley/ BIA / Dusky Wood Swallow (Artamus cyanopterus), Victoria, Australia

Jan Wegener/ BIA / Dusky Wood Swallow (Artamus cyanopterus), Victoria, Australia

Rob Drummond / White-browed Woodswallow (Artamus superciliosus) male, Victoria, Australia

Hanne & Jens Eriksen / Ashy woodswallow (Artamus fuscus) on branch, Thailand, February

Rob Drummond / White-breasted Woodswallow (Artamus leucorynchus) pair, Queensland, Australia

Rob Drummond / White-breasted Woodswallow (Artamus leucorynchus) pair, Queensland, Australia

Rob Drummond / White-breasted Woodswallow (Artamus leucorynchus) pair, Queensland, Australia

Rob Drummond / White-breasted Woodswallow (Artamus leucorynchus) group, Queensland, Australia

Rob Drummond / White-breasted Woodswallow (Artamus leucorynchus) pair, Queensland, Australia

Simon Bennett / Dusky Wood Swallow (Artamus cyanopterus) group on branch, Australia

Jan Wegener / White-browed Woodswallow (Artamus superciliosus) male and female, Victoria, Australia

Rob Drummond / White-browed Woodswallow (Artamus superciliosus), Victoria, Australia

Rob Drummond / Black-faced Woodswallow (Artamus cinereus), Queensland, Australia

Jan Wegener / Dusky Wood Swallow (Artamus cyanopterus) juvenile, Perth, Australia

Roland Seitre / White-breasted wood swallows (Artamus leucorhynchus) perched together, Lifou, Loyalty Islands Province, New Caledonia

Roland Seitre / White-breasted wood swallows (Artamus leucorhynchus) perched in a line, Oro, Ile des Pins / Isle of Pine, South Province, New Caledonia.

Martin Willis / White-browed Woodswallow (Artamus superciliosus) and Masked Woodswallow (Artamus personatus) groups gather in dead tree, Bourke, New South Wales, Australia

Martin Willis / White-browed Woodswallow (Artamus superciliosus) female at nest in hollow stump, Bourke, New South Wales, Australia

Martin Willis / White-browed Woodswallow (Artamus superciliosus) male at nest in hollow stump, Bourke, New South Wales, Australia

Martin Willis / White-breasted Woodswallow(Artamus leucorynchus) pair, Townsville, Queensland, Australia

Martin Willis / Masked Woodswallow (Artamus personatus), Bourke, New South Wales, Australia

Martin Willis / Black-faced Woodswallow (Artamus cinereus), Townsville, Queensland, Australia

Konrad Wothe / White-breasted Woodswallow (Artamus leucorynchus), Townsville, Queensland, Australia

Jouan & Rius / Masked woodswallow (Artamus personatus) pair perched, Central Australia, Australia

Jouan & Rius / Masked wood swallow (Artamus personatus) female, Central Australia

Steven David Miller / White-breasted Woodswallow {Artamus leucorynchus} on dead tree branch looking out for insects, Winter, Lake Argyle, Western Australia

Steven David Miller / White-breasted Woodswallow {Artamus leucorynchus} on dead tree branch looking out for insects, Winter, Lake Argyle, Western Australia

Dave Watts / Dusky Woodswallow (Artamus cyanopterus) Tasmania, Australia

Patricio Robles Gil / Great Woodswallow (Artamus maximus) group of six perched on a branch, highlands of Papua New Guinea

Greg Oakley/ BIA / Black-faced Woodswallow (Artamus cinereus), Northern Territory, Australia

Martin Willis / White-browed Woodswallow (Artamus superciliosus) and Masked Woodswallow (Artamus personatus) groups gather in dead tree, Bourke, New South Wales, Australia

Martin Willis / White-browed Woodswallow (Artamus superciliosus) eggs in nest built in hollow stump, Bourke, New South Wales, Australia

Martin Willis / White-browed Woodswallow (Artamus superciliosus) female carrying twig, Bourke, New South Wales, Australia

Martin Willis / White-browed Woodswallow (Artamus superciliosus) male sitting on nest in a hollow stump, Bourke, New South Wales, Australia

Martin Willis / White-browed Woodswallow (Artamus superciliosus) male at nest in hollow stump, Bourke, New South Wales, Australia

Martin Willis / White-browed Woodswallow (Artamus superciliosus) pair at nest in hollow stump, Bourke, New South Wales, Australia

Martin Willis / Masked Woodswallow (Artamus personatus) approaching nest in hollow stump, Bourke, New South Wales, Australia

Rob Drummond, BIA / White-browed Woodswallow (Artamus superciliosus) male, New South Wales, Australia

Bruce Thomson / White-browed woodswallow (Artamus superciliosus) perched on branch in late afternoon light, Thargomindah, Queensland, Australia.

Bruce Thomson / Black-faced woodswallow (Artamus cinereus) perched on branch, Thargomindah, Queensland, Australia.

Bruce Thomson / Black-faced woodswallow (Artamus cinereus) perched on branch, Thargomindah, Queensland, Australia.

Tom Vierus / Fiji woodswallow (Artamus mentalis) perched on branch against blue sky, Turtle Island, Yasawa Islands, Fiji.

Tom Vierus / Fiji woodswallow (Artamus mentalis) perched on a cable in the rain. The bird stretches its wing and tail feathers. This species is endemic to Fiji. Viti Levu, Fiji.

Bruce Thomson / Little woodswallow (Artamus minor) perched on branch, Currawinya National Park, Queensland, Australia.

Bruce Thomson / White-browed woodswallow (Artamus superciliosus) feeding chicks in nest, Quilpie, Queensland, Australia.

Bruce Thomson / White-breasted woodswallow (Artamus leucorhynchus), mating pair, Bollon, Queensland, Australia.

Bruce Thomson / Dusky woodswallow (Artamus cyanopterus) perching near nest in dead tree, Coffin Bay, South Australia.