British Trust for Ornithology (BTO)

The British Trust for Ornithology (BTO) is a UK charity that focuses on understanding birds and, in particular, how and why bird populations are changing.

Recent articles by British Trust for Ornithology (BTO)

Male blackbird. © Duncan Shaw/Getty

Common blackbird guide: species facts, how to identify males, females and juveniles

Male house sparrow. © Edmund Fellowes/BTO

House sparrow guide: species facts, how to identify, and how to put up a nestbox for them

Robin (Erithacus rubecula) in spring

European robin guide: diet, habitat and species facts

© Graham Catley/BTO

7 bearded tit facts you need to know

© Allan Drewitt/BTO

6 common tern facts you need to know

© Chris Knights/BTO

6 nightjar facts you need to know

Whitethroat - Sylvia communis

6 whitethroat facts you need to know

© Jill Pakenham/BTO

6 oystercatcher facts you need to know

© John Harding/BTO

6 teal facts you need to know

© Morris Rendall/BTO

6 Bohemian waxwing facts you need to know

© GH Higginbotham/BTO

6 black-headed gull facts you need to know

© John Harding/BTO

6 brambling facts you need to know

© John Harding/BTO

6 starling facts you need to know

© Jill Pakenham/BTO

6 amazing greenfinch facts

Male sparrowhawk (Accipiter nisus) perched sitting on a plucking post with prey. © DJEPhotography/Getty

7 sparrowhawk facts you need to know