Except, that is, in the case of the hot pink San Juan Worm. There's another mystery. If you had to pick one fly to fish, the pink worm wouldn't be a bad call anywhere--at least not if you are willing to concede that the San Juan Worm is really a fly in the first place. I know that rains will push annelids into the water during runoff or after storms. Trout see those worms and think they're T-bone steaks. Pure protein. But none of the worms are naturally hot pink. I try wine colored worms, chartreuse worms, red worms, tan worms, brown worms, and many other colors. Nothing produces for me like hot pink.