Bernard Castelein / Lesser Adjudant Stork (Leptoptilos javanicus) calling. Assam, India, February.

Bernard Castelein / Shore Lark (Eremophila alpestris) singing, Tsomoriri lake, Ladakh, India

David Tipling / Fighting cock tied to post, crowing, Narra, Palawan, Philippines

Tim Laman / Male King of Saxony (Pteridophora alberti) bird of paradise calling from a dead branch high in the canopy in the vicinity of Mt. Hagen, Enga Province, Papua New Guinea.

Tim Laman / Brown-winged Kingfisher (Halcyon amauroptera) calliing in the mangroves, Sundarban Forest, Khulna Province, Bangladesh.

Bernard Castelein / Southern plains grey / Hanuman langur {Semnopithecus dussumieri} sitting on rock showing threat behaviour, Rajasthan, India

Tim Laman / Rhinoceros hornbill (Buceros rhinoceros) female perched in tree, calling. Gunung Palung National Park, West Kalimantan, Borneo, Indonesia.

Tim Laman / Bushy-crested Hornbill (Anorrhinus galeritus) juvenile, shortly after emerging from nest cavity. Gunung Palung National Park, Borneo, Indonesia

Tim Laman / Female Knobbed hornbill (Aceros cassidix) calling in tree. Tangkoko Batuangus / Dua Saudara Nature Reserve, Sulawesi Island, Indonesia.

Bernard Castelein / Indian flying fox {Pteropus giganticus} hanging from branch and calling, Bund Baretha, Rajasthan, India

Bernard Castelein / Nepalese monks chanting during 'Duk chu' festival, Lo-Manthang, Upper Mustang, Nepal.

Bernard Castelein / Indian elephant (Elephas maximus) male trumpeting, Assam, India