

The abundance in each month is indicated as follows:
No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time| J | F | M | A | M | J | J | A | S | O | N | D | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adult | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
| Larval | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Freshwater Marshes SSSI (SZ38) | 1945 | - | Anon | - |
| Freshwater Marshes SSSI (SZ38) | 1946 | - | Anon | - |
| Freshwater (SZ38) | 04/10/1947 | one | Marcus Oldfield | Adult |
| Freshwater Bay (SZ38) | 01/10/1949 | one | Barry Goater | Adult |
| Freshwater (SZ38) | 28/09/1950 | one | Marcus Oldfield | Adult |
| Freshwater (SZ38) | 29/09/1950 | one | Marcus Oldfield | Adult |
| Freshwater Marshes SSSI (SZ38) | 1951 | - | Anon | - |
| Freshwater Bay (SZ38) | 05/10/1951 | two | Barry Goater | Adult |
| Freshwater Marshes SSSI (SZ38) | 1952 | - | Anon | Adult |
| Totland (SZ38) | 12/10/2007 | one | Sam Knill-Jones | Adult |
| Afton Marsh NR (SZ38) | 05/10/2011 | one | James Halsey | Adult |
| Afton Marsh NR (SZ38) | 10/10/2012 | two | James Halsey | Adult |
| Afton Marsh (SZ38) | 29/09/2014 | one | Stephen Plummer, James Halsey | Adult |
| Freshwater Cliffs (SZ38) | 10/10/2015 | one | Sue Davies | Adult |
| Totland (SZ38) | 10/10/2018 | one | Sam Knill-Jones | Adult |
| Afton Marsh (SZ38) | 28/09/2020 | one | Iain Outlaw | Adult |