John Shaw / Chestnut-eared aracari (Pteroglossus castanotis) on cat-gut vine. Pantanal, Brazil, August.

Graeme Guy/ BIA / Chestnut-headed Bee-eater (Merops leschenaulti) trio with insect prey, Penang, Malaysia

Glenn Bartley/ BIA / Chestnut-bellied Cuckoo (Hyetornis pluvialis) calling, Jamaica

Piotr Naskrecki / Chestnut Short-tailed Bat (Carollia castanea) flying, La Selva Biological Reserve, Costa Rica

Chien Lee / Chestnut-capped Laughingthrush (Garrulax mitratus), Kinabalu National Park, Sabah, Malaysia

Bence Mate / White-throated Mountain Gem (Lampornis castaneoventris), Green-crowned Brilliant (Heliodoxa jacula) group of three with one in flight, Savegre, Costa Rica

Niall Benvie / Queen Mary's Tree, a veteran Sweet chestnut (Castanea sativa) over 600 years old, Cumbernauld, Scotland, UK, July.

Juan Carlos Munoz / Ferns growing near fallen tree in Chestnut forest, Onati, Gipuzkoa, Basque Country, Spain, Europe

Rob Drummond / Chestnut Teal (Anas castanea) male, Victoria, Australia

Graeme Guy / Chestnut-headed Bee-eater (Merops leschenaulti) male, Penang, Malaysia

Dong Lei / Chestnut-headed Tesia (Tesia castaneocoronata) perched, Sichuan Province, China.

Jan Wegener / Chestnut Teal (Anas castanea) male, Victoria, Australia