It looks like you’re referring to a specific fly fishing product—the Adams “Catskill” Dry Fly in size 22, likely from Umpqua Feather Merchants. Here’s a breakdown of the details:

Adams “Catskill” Dry Fly (Size 22)
– Pattern: Adams (a classic dry fly imitation of a mayfly)
– Style: Catskill tie (traditional, sparse, and highly floatable)
– Size: 22 (very small, ideal for selective trout in slow, clear water)
– Brand: Umpqua (known for high-quality, commercially tied flies)
– Use: Designed for dry fly fishing, imitating small mayflies like Baetis (Blue-Winged Olives)

When & How to Use It
– Best Conditions: Slow-moving or still water, hatches of small mayflies
– Target Species: Trout (especially selective or pressured fish)
– Presentation: Dead-drift with light tippet (6X–7X), possibly with floatant
– Common Hatches Matched: Midges, small Baetis, Tricos (depending on size)

Why Size 22?
– Effective when trout are keyed in on tiny insects.
– Challenging to tie and fish due to small size—requires good eyesight and delicate casting.

6 Adams "Catskill" Dry Size 22 Flies Umpqua Fishing Fly

Alternatives/Similar Flies
– Parachute Adams (better visibility in low light)
– RS2 (if fish are taking emergers)
– BWO Sparkle Dun (for a more realistic mayfly profile)

Would you like tips on fishing this fly or alternatives for specific conditions?