Steve Knell / Northern gannets (Morus bassanus) displaying in symetry at breeding colony, Saltee Islands, County Wexford, Republic of Ireland, May

Tim Laman / Paradise Riflebird (Ptiloris paradiseus) young male performing a practice display, Papua New Guinea

Tim Laman / Greater Bird of Paradise (Paradisaea apoda) male performing inverted static display, Badigaki Forest, Wokam Island in the Aru Islands, Indonesia.

Tim Laman / Victoria's Riflebird (Ptiloris victoriae) male on display perch trying to lure a female to come down with his spread wings display, Atherton Tablelands, Wooroonooran National Park, Queensland, Austral...

Tim Laman / Victoria's Riflebird (Ptiloris victoriae) male on display perch trying to lure a female down to his perch with a spread wings display, Atherton Tablelands, Wooroonooran National Park, Queensland, Aust...