Steven David Miller / Great bowerbird (Chlamydera nuchalis), male showing off treasures whilst female inspects bower. Lake Argyle, Kununurra, Western Australia.

Ingo Arndt / Vogelkop bowerbird (Amblyornis inornatus) decoration material (fruit and beetle elytra ) collected in order to attract females to his bower, Arfak Mountains, Irian Jaya, New Guinea, Indonesia.

Ingo Arndt / Vogelkop bowerbird (Amblyornis inornatus) decoration material (fungus) collected in order to attract females to his bower, Arfak Mountains, Irian Jaya, New Guinea, Indonesia.

Ingo Arndt / Vogelkop bowerbird (Amblyornis inornatus) decoration material (blue rotten wood) collected in order to attract females to his bower, Arfak Mountains, Irian Jaya, New Guinea, Indonesia.

Ingo Arndt / Bower of Vogelkop Bowerbird (Amblyornis inornatus) decorated with various types of leafs, beetle wing covers, black and brown fungi, red flowers and blue berries, Arfak Mountains, West Papua, Indonesi...

Ingo Arndt / Great Bowerbird (Chlamydera nuchalis) male at courting bower, Litchfield National Park, Australia.

Ingo Arndt / Bower of Vogelkop bowerbird (Amblyornis inornatus) front entrance of bower decorated with red fruit and acorns, Arfak Mountains, West Papua, Indonesia.

Ingo Arndt / Male Vogelkop Bowerbird (Amblyornis inornatus) constructing bower roof. Arfak Mountains, West Papua, Indonesia.

David Tipling / Satin Bowerbird (Ptilonorhynchus violaceus) male depositing blue pen at bower, Lamington NP, Queensland, Australia, September

Tim Laman / Golden-fronted / Yellow-fronted Bowerbird (Amblyornis flavifrons) male at his bower at approx 1700 m. Endemic species to the Foja Mountains, Papua, Indonesia, 2008. (taken during Conservation Internat...

Dave Watts / Regent bowerbird (Sericulus chrysocephalus) male perched, Lamington National Park, Queensland, Australia, October

Dave Watts / Satin Bowerbird (Ptilonorhynchus violaceus) male arranging blue plastic ornaments and feather at bower, Australian Capital Territory, Australia, September

Tim Laman / Bower of Vogelkop Bowerbird (Amblyornis inornata) decorated with various types of trash and some flowers. West Papua, Indonesia, Dec 2008

Tim Laman / Ornithologist Brett Benz prepares a Huon Macgregor's Gardener Bowerbird (Amblyornis macgregoriae) museum specimen. At the Araurong field camp in the Sarawaget Range Indonesia, Dec 2006

Tim Laman / Vogelkop bowerbird (Amblyornis inornata) holding berries used to decorate bower. Dec 2004

Barrie Britton / Decorated bower of Vogelkop Bowerbird (Amblyornis inornata). Vogelkop Peninsula, West Papua, Indonesia. Picture taken during filming for the BBC "Life" TV Series, September 2008

Barrie Britton / Male Vogelkop bowerbird (Amblyornis inornata) inspects the decorations outside his bower. Vogelkop Peninsula, West Papua, Indonesia. Picture taken during filming for BBC "Life" TV Series, September 20...

Barrie Britton / Male Vogelkop bowerbird (Amblyornis inornata) outside his decorated bower. Vogelkop Peninsula, West Papua, Indonesia. Picture taken during filming for BBC "Life" TV Series, September 2008

RICHARD KIRBY / Vogelkop gardener bowerbird male tending bower to attract mate Irian Jaya / West Papua, Western New Guinea

RICHARD KIRBY / Vogelkop gardener bowerbird male tending bower to attract mate Irian Jaya / West Papua, Western New Guinea

RICHARD KIRBY / Bower of the Vogelkop gardener bowerbird (Amblyornis inornata) built by the male to attract a female, Irian Jaya / West Papua, Western New Guinea

Matthias Breiter / Great Bowerbird (Chlamydera nuchalis) male displaying in front of female in lek, Australia

Kevin Schafer / Satin Bowerbird (Ptilonorhynchus violaceus) male in bower decorated with blue objects and yellow flowers, Lamington National Park, Queensland, Australia

Gerry Ellis / Great Bowerbird (Chlamydera nuchalis) male in courting bower, Katherine Gorge National Park, Australia

Konrad Wothe / Satin Bowerbird (Ptilonorhynchus violaceus) male arranging blue ornaments to impress female in bower, Victoria, Australia

Konrad Wothe / Brown Gardener (Amblyornis inornatus) male and his bower decorated to attract a mate, Arfak Mountains, Irian Jaya, New Guinea, Indonesia

David Tipling / Male Satin bowerbird (Ptilonorhynchus violaceus) standing in its bower in the rainforest, surrounded by sticks and colourful objects, mainly blue, it has collected as part of courtship ritual, Laming...

Bruce Thomson / Satin bower bird (Ptilonorhynchus violaceus) male bird in front of bower on rainforest floor at night, Bunya Mountains, Queensland, Australia.

Bruce Thomson / Regent bowerbird (Sericulus chrysocephalus) female sitting in budding Mango tree (Mangifera indica) Ravensbourne, Queensland, Australia.

Bruce Thomson / Regent bowerbird (Sericulus chrysocephalus) male sitting in budding mango tree (Mangifera indica), Ravensbourne, Queensland, Australia.

Bruce Thomson / Regent bowerbird (Sericulus chrysocephalus) male sitting in budding mango tree (Mangifera indica) Ravensbourne, Queensland, Australia.

Etienne Littlefair / Satin bowerbird (Ptilonorhynchus violaceus), maintaining his bower, Ravenshow, North Queensland, Australia, October.

Etienne Littlefair / Golden Bowerbird (Prionodura newtoniana), placing flowers on bower, Ravenshoe, North Queensland, Australia, October.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) male decorating bower at display site. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) male perched on branch, material to decorate bower in beak. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) male at bower. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) male constructing bower at display site, material in beak. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) pair at bower. Papua New Guinea.

Konrad Wothe / MacGregor's bowerbird (Amblyornis macgregoriae) bower in rainforest. Eastern Highlands, Papua New Guinea.