Welcome to the Upper Thames Branch of Butterfly Conservation
The Upper Thames region covers Berkshire, Buckinghamshire and Oxfordshire,
which includes the Chiltern Hills and the North Wessex Downs Areas of Outstanding Natural Beauty. It is home to several
rare species of lepidoptera, including the Black Hairstreak, Adonis Blue, Silver-spotted Skipper and Duke of
Burgundy butterflies, and the Striped Lychnis moth.