If Zane Grey first put New Zealand on the international fly fishing map by celebrating the Tongariro in the 1920s, the river where the dry-fly sport developed most was the Mataura River in Southland. The river's lush bug life inspired Norman Marsh's "Trout Stream Insects of New Zealand," still the best book of its kind in our angling lore. The river is famous for its hatches of midge, caddis and Deleatidium mayflies, and on calm summer evenings we can experience an intense rise during the gloaming. One evening I was guiding Connie and Jay, newlyweds from Canada, and the sunset was memorable.