I just got back from Colorado. We did some fishing while we were up there and caught some trout. My eldest son informed me that Saint Zeno is the patron saint of fly fisherman.
Zeno (d. 371 or 380) is the patron saint of fly fishermen, the city of Verona, newborn babies as well as children learning to speak and walk.
He is most often represented with fishing-related items such as a fish, fishing rod, or a bishop holding a fishing rod, or with a fish hanging from his crozier. Zeno likely fished with a fly since this practice was popular in his time.
The other patrons of fishing: Saint John, Saint James, Saint Andrew, and Saint Peter.