| Month | Day and Species | Early / Average ▲ / Late for previous 10 years* and 2026 ⦿ |
|---|---|---|
| January | 3rd Red Admiral | 3 Jan
1 Jan 19
24 Jan 21
|
| 14th Peacock | 14 Jan
1 Jan 19
5 Feb 21
| |
| 18th Brimstone | 18 Jan
8 Jan 19
20 Feb 21
| |
| February | 24th Comma | 24 Feb
10 Jan 18
7 Mar 15
|
| 24th Small Tortoiseshell | 24 Feb
2 Jan 15
28 Feb 25
| |
| 25th Large Tortoiseshell | 25 Feb
19 Feb 22
6 Apr 15
| |
| 25th Large White* UK First | 25 Feb
6 Mar 25
12 Apr 16
| |
| March | 2nd Small White | 2 Mar
23 Feb 19
21 Mar 16
|
| 11th Green-veined White | 11 Mar
18 Feb 22
10 Apr 16
| |
| 18th Orange-tip* UK First | 18 Mar
17 Feb 22
14 Apr 18
| |
| 18th Speckled Wood | 18 Mar
7 Feb 23
6 Apr 15
| |
| 18th Holly Blue | 18 Mar
10 Feb 22
17 Apr 16
| |
| April | 6th Green Hairstreak | 6 Apr
30 Mar 19
18 Apr 15
|
| 7th Small Copper | 7 Apr
30 Mar 19
5 May 18
| |
| 7th Grizzled Skipper | 7 Apr
30 Mar 19
29 Apr 23
| |
| 8th Painted Lady | 8 Apr
6 Jan 16
4 May 18
| |
| 9th Wall | 9 Apr
6 Apr 25
30 Apr 15
| |
| 12th Dingy Skipper* UK First | 12 Apr
8 Apr 17
30 Apr 23
| |
| 12th Common Blue* UK First | 12 Apr
17 Apr 25
12 May 15
| |
| 17th Clouded Yellow | 17 Apr
21 Mar 22
12 Jun 25
| |
| 18th Duke of Burgundy* UK First | 18 Apr
19 Apr 25
7 May 21
| |
| 18th Pearl-bordered Fritillary* UK First | 18 Apr
11 Apr 25
4 May 24
| |
| 20th Small Heath* UK First | 20 Apr
14 Apr 17
30 Apr 15
| |
| 23rd Brown Argus* UK First | 23 Apr
21 Apr 22
12 May 15
| |
| 24th Wood White | 24 Apr
1 May 25
29 May 24
| |
| 26th Small Blue | 26 Apr
26 Apr 22
16 May 16
| |
| 27th Adonis Blue* UK First | 27 Apr
28 Apr 25
20 May 23
| |
| May | 1st Meadow Brown* UK First | 1 May
8 May 25
11 Jun 15
|
| 9th Large Skipper | 9 May
10 May 25
9 Jun 15
| |
| 12th Small Pearl-bordered Fritillary | 12 May
6 May 25
3 Jun 23
| |
| 29th Black Hairstreak | 29 May
21 May 19
13 Jun 21
| |
| 30th White-letter Hairstreak* UK First | 30 May
2 Jun 25
1 Jul 21
| |
| 30th White Admiral* UK First | 30 May
8 Jun 18
29 Jun 15
| |
| 30th Small Skipper | 30 May
4 Jun 25
20 Jun 24
| |
| 30th Marbled White | 30 May
2 Jun 25
17 Jun 16
| |
| 31st Silver-washed Fritillary | 31 May
5 Jun 19
24 Jun 16
| |
| June | 1st Silver-studded Blue | 1 Jun
29 May 17
13 Jun 21
|
| 5th Long-tailed Blue | 5 Jun
6 Jan 19
5 Aug 24
| |
| 5th Dark Green Fritillary | 5 Jun
30 May 22
21 Jun 24
| |
| 12th Purple Emperor | 12 Jun
15 Jun 17
30 Jun 15
| |
| 13th Purple Hairstreak | 13 Jun
4 Jun 19
4 Jul 21
| |
| 13th Ringlet | 13 Jun
3 Jun 19
24 Jun 16
| |
| 14th Gatekeeper* UK First | 14 Jun
12 Jun 25
2 Jul 16
| |
| 16th Essex Skipper | 16 Jun
17 Jun 17
1 Jul 21
| |
| 28th Chalk Hill Blue | 28 Jun
24 Jun 22
16 Jul 15
| |
| 28th Queen of Spain Fritillary | 28 Jun
12 Aug 22
12 Aug 22
| |
| 29th Brown Hairstreak | 29 Jun
2 Jul 22
1 Aug 15
| |
| July | 15th Silver-spotted Skipper | 15 Jul
6 Jul 23
23 Jul 24
|
| 21st Swallowtail | 21 Jul
7 May 18
28 Jul 24
|
*National first / *Ex 2020 (Covid/lockdown)
