The torrent duck is a member of the duck, goose and swan family Anatidae. It is the only member of the genus Merganetta. It is placed in the shelduck subfamily Tadorninae after the "perching duck" assemblage to which it was formerly assigned was dissolved because it turned out to be paraphyletic.
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Low-Light Telephoto Systems
Identifying specific features of the Torrent Duck requires high-contrast magnification. Check out the top-rated 8x42 optics.