The Popsicle is three feathers, a few strands of flash, and a hook, and it has been moving fall salmon and steelhead on the swing since the mid-1980s. George Cook worked it out while guiding in Bristol Bay, and it has moved fish across the Great Lakes, the Skeena, and the coho rivers of Bristol Bay ever since. It is also one of the best flies a new tyer can start with. There are almost no parts to it, marabou forgives an unsteady hand, and the one skill it teaches, palmering a soft feather so it breathes in the water, carries straight into buggers, leeches, and full Intruders later on.

The Popsicle is a reaction fly. A Pacific salmon on its spawning run has largely stopped feeding; by the time it is in the river its body is turning toward the spawn, and a swung fly draws a grab out of aggression, territory, or plain reflex as it passes through the fish’s line of sight under tension. The Popsicle gives that fish a broad, bright, moving target and asks it to react. Steelhead and migratory browns are a different case: they keep feeding in the river, on eggs, nymphs, and baitfish, right alongside those reaction grabs. That is why the same fall run that eats a swung Popsicle also eats a dead-drifted egg.