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

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

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

Joris van Alphen / Spotted flycatcher (Muscicapa striata) helping its chick swallow a butterfly that is almost too large for it to handle. Thierache, France, July.

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

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

Laurent Geslin / Dusky wood swallow with two fledglings {Artamus cyanopterus} Australia.

Dave Watts / Two White-browed woodswallows (Artamus superciliosus) on a branch, Queensland, Australia

Dave Watts / Two White-browed woodswallows (Artamus superciliosus) on a branch, Queensland, Australia