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