British Trust for Ornithology

The British Trust for Ornithology (BTO) is an organisation founded in 1932 for the study of birds in the British Isles. The Duke of Cambridge has been patron since October 2020.

British Trust for Ornithology

The British Trust for Ornithology (BTO) is an organisation founded in 1932 for the study of birds in the British Isles. The Duke of Cambridge has been patron since October 2020.