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 butterfly and moth, including the Black Hairstreak, Adonis Blue, Silver-spotted Skipper and Duke of Burgundy butterflies, and the Striped Lychnis moth.

Please send comments about this website to webmaster@upperthames-butterflies.org.uk
It is possible to see three-quarters of the 58 British butterfly species in the Upper Thames region. More about our butterflies
Around 1000 moth species have been recorded in the Upper Thames region, with over 500 on our own reserve at Holtspur. More about our moths

First sightings (43)

14-Jul: Silver-spotted Skipper
14-Jul: Brown Hairstreak
07-Jul: Clouded Yellow
03-Jul: Chalk Hill Blue
29-Jun: Grayling


18-Nov: Field meeting (egg hunt)
Slade Camp, Headington, Oxford
19-Nov: Work party (Chiltern Rangers)
Holtspur Bank LNR
21-Nov: Work party (Sustrans)
East Hagbourne, Oxon
23-Nov: Work party (Chiltern Rangers)
MoD Arncott, Bicester, Oxon
25-Nov: Work party
Aston Upthorpe Downs, Oxon


17-Nov: Sightings updated
22-Aug: Black Hairstreak Species Champion Report is available
09-Aug: Members Day and AGM date announced
24-May: The Chequered Skipper reintroduction project has started
28-Apr: Oak Processionary Moth news