Dong Lei / Jungle Crow (Corvus macrorhynchos) perched on tree branch with rainbow, Shejila mountain, Qinghai-Tibetan Plateau, Tibet, China. July.

Kerstin Hinze / Jungle / Large-billed crow (Corvus macrorhynchos) adult calling, Shiretoko, Hokkaido, Japan

Dong Lei / Large-billed crow (Corvus macrorhynchos) in front of prayer flags, Mt Qomolangma National Park, Qinghai Tibet Plateau, China.

Staffan Widstrand / Wild Wonders of China / Large-billed crow (Corvus macrorhynchos) in the humid montane mixed forest, Laba He National Nature Reserve, Sichuan, China

Barrie Britton / White-rumped Vulture (Gyps bengalensis) with large-billed Crow (Corvus macrorhynchos). Preah Vihear Protected Forest, Cambodia. Picture taken during filming for BBC 'Lands of the Monsoon' TV series.

Danny Green / Steller's sea eagle (Haliaeetus pelagicus) and Large billed crow (Corvus macrorhynchos.) in snow, Japan, February

Dong Lei / Large-billed crow (Corvus macrorhynchos) perched on post, Napahai Lake, Zhongdian County, Yunnan Province, China. January.

Dong Lei / Large-billed Crow (Corvus macrorhynchos) perched on the back of Wild boar (Sus scrofa) foraging in silt of Napahai Lake, Zhongdian County, Yunnan Province, China. January.

Dong Lei / Large-billed crow (Corvus macrorhynchos) Mount Qomolangma National Park, Dingjie County, Qinghai-Tibet Plateau, Tibet, China, Asia

Chris Gomersall / Carcass of cow with scavenging Thick billed crows (Corvus macrorhynchos) and feral dog. Haryana, India. March 2005. The population crash of wild vultures in the Indian subcontinent has caused concerns...

Chris Gomersall / Wild oriental white-backed (Gyps bengalensis) adult being mobbed by large-billed crow (Corvus macrorhynchos) in Haryana, India. March

Roland Seitre / Jungle Crow (Corvus macrorhynchos) on rock, Bhutan.