Bence Mate / Black crowned night heron (Nycticorax nycticorax) at twilight with other herons in the background, including Grey heron (Ardea cinerea) in flight, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hun...

Gabriel Rojo / Black-crowned night-heron (Nycticorax nycticorax) perched in bush. Pantanal, Brazil.

Melvin Grey / Night heron (Nycticorax nycticorax) male standing in water. Kiskunsagi National Park, Hungary. May.

Melvin Grey / Night heron (Nycticorax nycticorax) male standing stalking prey in water. Kiskunsagi National Park, Hungary. May.

Bernard Castelein / Black-crowned Night Heron (Nycticorax nycticorax), Keoladeo NP, Bharatpur, India

John Chan / Portrait of a juvenile Black-crowned night heron (Nycticorax nyticorax), Southern California, USA, July.

John Chan / Portrait of a juvenile Black-crowned night heron (Nycticorax nyticorax), Southern California, USA, July.

John Chan / Black-crowned night heron (Nycticorax nyticorax) raising its crest in response to a nearby threat, Southern California, USA, July.

John Chan / Black-crowned night heron (Nycticorax nyticorax) perched on a fence, Southern California, USA, July.

John Cancalosi / Black-crowned night-heron (Nycticorax nycticorax) juvenile preening whilst standing on log. Toxin forming Blue-green algae (Woronichinia naegeliana) in water behind. Maryland. October 2018.

Staffan Widstrand / Wild Wonders of China / Black-crowned night heron (Nycticorax nycticorax) adult sitting on a branch in East Lake Greenway park, Wuhan, Hubei, China

Staffan Widstrand / Wild Wonders of China / Young Black-crowned night heron (Nycticorax nycticorax) flying, East Lake Greenway park, Wuhan, Hubei, China

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 / 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.

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