The lake at Cwmystradllyn
Pwllheli & District Angling Association
Pwllheli & District Angling Association
Pwllheli & District Angling Association


Imitative fly fishing is the most pure form of angling. An angler studies the water and the feeding patterns of the fish and selects a fly that has been tied to imitate what the fish are feeding on.

There is an abundance of natural insect life in Cwmystradllyn, so here are some suggested fly patterns to help you 'match the hatch' throughout the season as well as some traditional and lure patterns.

Spring: March to May
Fly Sizes Notes
Black Lure 14-10 Long shank
Black Pennel 14-10  
Cased Caddis 14-10 Long shank
Corrixa 16-20  
Gold Head Gold Ribbed Hare's Ear 16-10  
Hairy Prince 14-10 Long shank
Mallard & Claret 16-12  
March Brown 14-12  
Montana 14-10 Long shank
Peacock & Black 14-12 Weighted & un-weighted
Pheasant Tail Nymph 14-10  
Viva 14-10 Long shank
Zulu 14-10  
Summer: June to August
Fly Sizes Notes
Alexandra 14-10  
Bibio 14-10  Red or orange
Black & Claret 14-12  
Black Pennel 14-12  
Black Tadpole 14-10  
Connermara Black 14-10  
Corrixa 14-12  
Daddy Long Legs 10 Long shank
Damsel Nymph 14-10 Long shank
Diawl Bach 14-12  
Dunkell 14-10  
Haul a Gwynt 16-10  
Hawthorn 12-10  
Hoppers 16-10 Green & Black, Amber/Red mix
Ke-He 14-12  
Mallard & Claret 14-12  
Melanistic 14-10  
Muddlers 16-10 Short shank
Olives 16-10  
Pheasant Tail Nymph 16-10  
Red Ant 16-10  
Soldier Palmer 14-10  
Traed Flambo (Heather Fly) 16-12  
Autumn: September to October

As for Spring with the addition of:

Fly Sizes Notes
Cat's Whisker 14-10 Long shank
Gold Head Silver Squirrel 10 Short shank
Pink Tadpole 14-10 Short shank or Long shank
Red Ant 14-12  
Stick Fly 12-10 Weighted & un-weighted
Sunk Daddie 12-10