 Male. Taken at Otmoors, Oxon., on September 15th 2020. (1/800th sec at f13. © David Hastings)  Female f. helice. Taken at Paklenica Nat Park, Croatia, on June 8th 2017. (1/1000th sec at f13. © David Hastings) Description Family: Pieridae Wing span: 54 - 63 mm A fast-flying, bright yellow butterfly, the Clouded Yellow can sometimes be seen in large numbers but in other years is very rare. This is because numbers in the British Isles depend on migrants arriving from Europe. Clouded Yellows are most common in southern England, but can be seen as far north as Scotland. Adults usually arrive in May and June. These early immigrants may breed and give rise to one or two further generations. The larval foodplants are leguminous plants, particularly Lucerne, Alfalfa, clovers and trefoils. Adults feed on Thistles and other nectar-rich grassland flowers. Clouded Yellows fly very rapidly, but will pause to feed on flowers. Least Concern Sightings | 18-Sep-2022 | : | Chimney Meadows, Oxon | (2) | | 23-Jul-2022 | : | Hackpen Hill, Oxon | (2) | | 22-Jul-2022 | : | Radley Lakes, Oxon | (2) |
| | 01-Oct-2020 | : | Otmoor, Oxon | (1) | | 21-Sep-2020 | : | Abingdon, Oxon | (1) | | 15-Sep-2020 | : | Otmoor, Oxon | (5m) | | 14-Sep-2020 | : | Radley Lakes, Oxon | (1) |
| | 16-Jul-2019 | : | Ardley Quarry, Oxon | (1) |
| | 16-Nov-2018 | : | Extremadura, Spain | (1) | | 15-Nov-2018 | : | Extremadura, Spain | (2) | | 14-Nov-2018 | : | Extremadura, Spain | (2) | | 13-Nov-2018 | : | Extremadura, Spain | (2+) | | 10-Oct-2018 | : | Otmoor, Oxon | (1) | | 27-Sep-2018 | : | Chimney Meadows, Oxon | (20+) | | 06-Aug-2018 | : | Otmoor, Oxon | (1) | | 24-Jul-2018 | : | Vercors Natural Park, France | | | 23-Jul-2018 | : | Vercors Natural Park, France | | | 21-Jul-2018 | : | Vercors Natural Park, France | | | 11-Mar-2018 | : | Fuerteventura, Canary Islands | |
| | 06-Aug-2017 | : | Cothill Fen, Oxon | (1) | | 11-Jun-2017 | : | Velebits National Park, Croatia | | | 09-Jun-2017 | : | Paklenica National Park, Croatia | | | 08-Jun-2017 | : | Paklenica National Park, Croatia | | | 07-Jun-2017 | : | Gracac, Croatia | | | 06-Jun-2017 | : | Irinovac, Croatia | |
| | 29-Aug-2016 | : | Aston Rowant NNR, Oxon | (4) |
| | 22-Aug-2015 | : | Aston Rowant NNR, Oxon | (1m) | | 26-Jul-2015 | : | Baderitza, Bulgaria | | | 25-Jul-2015 | : | Nr Dobrinishte, Bulgaria | | | 23-Jul-2015 | : | Mesta River fishponds, Bulgaria | | | 23-Jul-2015 | : | nr Novo Hodzhovo, Bulgaria | | | 22-Jul-2015 | : | nr Sandanski, Bulgaria | | | 21-Jul-2015 | : | nr Petrovo, Bulgaria | | | 21-Jul-2015 | : | Rupite Hot Springs, Bulgaria | | | 20-Jul-2015 | : | nr Samokov, Bulgaria | |
| | 05-Oct-2014 | : | Chimney Meadows, Oxon | (1) | | 28-Sep-2014 | : | Abingdon, Oxon | (2) | | 24-Aug-2014 | : | Abingdon, Oxon | (1m) | | 16-Aug-2014 | : | Aston Upthorpe Downs, Oxon | (1) | | 03-Aug-2014 | : | Otmoor, Oxon | (2) | | 25-Jun-2014 | : | General Todorov, Bulgaria | | | 24-Jun-2014 | : | nr Novo Hodzhovo, Bulgaria | | | 24-Jun-2014 | : | Mesta River fishponds, Bulgaria | | | 24-Jun-2014 | : | Papaz Tchair, Bulgaria | | | 23-Jun-2014 | : | Trigrad Gorge, Bulgaria | | | 23-Jun-2014 | : | Borino, Bulgaria | | | 22-Jun-2014 | : | Smolyan Lakes, Bulgaria | | | 22-Jun-2014 | : | Plazishte, Bulgaria | | | 20-Jun-2014 | : | Valchi Dol, Bulgaria | | | 20-Jun-2014 | : | nr Dolna Kula, Bulgaria | |
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