The big butterfly count is a nationwide survey aimed at helping us assess the health of our environment. It was launched in 2010 and has rapidly become the world’s biggest survey of butterflies. Over 60,000 people took part in 2017, submitting 62,500 counts of butterflies and day-flying moths from across the UK.
See here for free butterfly chart or free App to download. https://www.bigbutterflycount.org/