Welcome to the Upper Thames Branch of Butterfly Conservation

Founded in 1982, the Upper Thames Branch aims to protect butterflies, moths and their habitats in the counties of Berkshire, Buckinghamshire and Oxfordshire. The Chiltern Hills, the Oxfordshire/Berkshire Downs, the Oxford and Aylesbury clay vales, the Bernwood Forest complex, the edge of the Cotswolds and the Berkshire heathlands are all to be found in the three counties. Several rare species of lepidoptera can be found in the region, including the Black Hairstreak, Adonis Blue, Silver-spotted Skipper and Duke of Burgundy butterflies, and the Striped Lychnis and Heart moths.
The Branch is entirely run by volunteers. If you think you may be able to help us in any way please click here to find out more.
Submit Butterfly Sightings
The Big Butterfly Count runs from 18th July to 10th August. Find out how to take part here.
The programme for the 2025 Members Day on 25th October has been finalised. Please click here for details.
Butterflies
Three-quarters of the fifty-eight British butterfly species can be found in the Upper Thames region. More about butterflies
Moths
Over 1700 species of moth have been recorded in the Upper Thames region. More about moths
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Events
29-Jun: Guided Walk : Hackpen Hill, Oxon
01-Jul: Guided Walk : Maidenhead Thicket, Berks
02-Jul: Guided Walk : East Hagbourne, Oxon
10-Jul: Guided Walk : Ivinghoe Beacon, Bucks