They don’t wear white coats and goggles, but they are in their laboratory almost every summer day collecting data and testing theories leading to breakthroughs in the art (and science) of catching giant smallmouth bass. They are Tim Landwehr — one of the speakers at the upcoming Hawkeye Fly Fishing Association’s annual show — and the guides at his Tight Lines Fly Fishing Company in De Pere, Wis.

Their research and analysis is the heart of their popular 2017 book, “Smallmouth: Modern Fly Fishing Methods, Tactics and Techniques,” now in its second printing, said Landwehr, who has personally guided more than 2,000 trips. That same research and analysis, he said, will inform his presentations: “Becoming a Better Smallmouth Angler” at 7:15 p.m. Feb. 15 and “Smallmouth Master Class” at 10 a.m. Feb. 17. The three-day show, which includes many other presentations and demonstrations, is at the Ramada Hotel in Williamsburg.

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