Editing Torrent duck (section)

== Subspecies ==
The [[subspecies]] taxonomy can be confusing. Males of the southern [[nominate subspecies]] ''M. a. armata'', the Chilean torrent duck, have grey back and blackish underparts, with a chestnut belly. Males of the slightly smaller northern subspecies, the Colombian torrent duck, ''M. a. colombiana'', are paler underneath, with streaked grey-brown underparts. Males of a third subspecies, the Peruvian torrent duck, ''M. a. leucogenis'', are intermediate but very variable in plumage; some have entirely black underparts (''turneri'' [[morph (zoology)|morph]]). Only males of the Chilean torrent duck have a black 'teardrop' mark beneath the eye. The Peruvian torrent duck is sometimes split into 4 subspecies (''leucogenis'', ''turneri'', ''garleppi'' and ''berlepschi''), but these are more likely simply color variations, as they are not limited to distinct areas.
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File:Merganetta armata - Rio Urumamba, Peru -juvenile and female-8.jpg|Juvenile (left) and female Peruvian torrent duck on the [[Urubamba River]], Peru
File:Merganetta armata - Rio Urumamba, Peru -male-8.jpg|Male Peruvian torrent duck on the rocky banks of the Urubamba River, Peru
File:MerganettaTurneriSmit.jpg|Male (top) and female Peruvian torrent duck, ''turneri'' morph
File:TorrentDuckM.jpg|Male Chilean torrent duck near [[Fitz Roy]], Argentina
File:TorrentDuckF.jpg|Female Chilean torrent duck near Fitz Roy, Argentina
</gallery>