A free program for Android, by UK Centre for Ecology and Hydrology.

There are over 2,000 species of butterflies in the UK. Unfortunately, more than 1,500 of them are in danger of extinction and are listed as either critically endangered or endangered. iRecord Butterflies is a free app developed by Butterfly Conservation and the UK Centre for Ecology & Hydrology to help you record and submit sightings of the UK’s most threatened butterflies. This app is also used to help us understand the causes of decline and inform conservation action on the ground to help threatened species.

Butterfly Conservation is a UK-based conservation charity, dedicated to the protection of Britain’s biodiversity. We use science and nature-based approaches to help safeguard our most precious wildlife. We work in partnership with other conservation organisations and are committed to finding innovative and practical solutions to the problems threatening Britain’s biodiversity.