Northern England — Hatch Calendar
Northern England encompasses the limestone rivers of Yorkshire (Wharfe, Ure, Swale) and the spate rivers of the Lake District and Cumbria (Eden, Eamont).
August 2026
1
5
10
15
20
25
30
Mayflies
Stoneflies
Midges
Terrestrials
Other
Active range Peak period Sparse Heavy / Blanket