- Ecology: Moderate
- Chemical: Unknown
Water quality details
- Dissolved oxygen: High
- Ammonia (Phys-Chem): High
- pH: High
- Phosphate: High
- Temperature: High
EA (England) · UKGB104027064258
12 Uhr(now) — Heather Fly
Peak activity at 12 Uhr — Heather Fly (Heather Fly, Peak emergence window)
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Hatch predictions
Top prey shown — see all 3 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.





EA (England) · UKGB104027064258
Bolton Abbey and Ilkley AA both list grayling 16 June – 14 March. Fly only on most beats, barbless/de-barbed, all grayling returned. Best fishing is autumn — September through December. Check the specific beat or association for day-ticket availability.
Prime sport 1 September → 31 December

12 Uhr(now) — Heather Fly
Peak activity at 12 Uhr — Heather Fly (Heather Fly, Peak emergence window)
Hatch predictions
Top nymph shown — see all 2 guilds as a supporter.
Start free trial14-day free trial. Cancel anytime.
Hatch predictions
Top prey shown — see all 3 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Backed by regional invertebrate surveys; no sampling on this exact reach yet.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.





EA (England) · UKGB104027064258
Bolton Abbey and Ilkley AA both list grayling 16 June – 14 March. Fly only on most beats, barbless/de-barbed, all grayling returned. Best fishing is autumn — September through December. Check the specific beat or association for day-ticket availability.
Prime sport 1 September → 31 December