Hello Andy and other admirers of this rather weird webbed creature,
for everyone's choice I give here the names which I gathered from sources in several languages, so you can see how ornithologists and citizen scientists always have been puzzled about these birds.
I can add a curious mistake which had occurred in the bird collection of a Dutch institute, not a school, but an organization which offers working shops for groups of pupils and receives them to get familiar with animals and biological matters, as an extension to the strict school program. In the collection was listed: "ei van Kaapse eend" (= egg of Cape duck). However, it is highly improbable that such a local institute would possess an egg of a Cape Teal; they only have mounted birds in glass cases and a couple of living Mandarin Ducks and a few chickens at their locality. Then I remembered that someone used a local name for the Muscovy Duck at a foray: Kaapse Eend. So that was the solution, the collection contained an egg of that species! I did not add it to the name collection below, because I never saw it written thus far.
There has been much confusion: musk (bisam) seems the right origin, although I do not know if this bird has a special odour; Moscow is out of order, I suppose, like most geographical links in the names, but these must have their origin in the places or regions where ornithologists or others saw this duck for the first time; however, Rayus' name Anas sylvestris brasiliensis is a good choice for the wild bird.
The generic name Cairina must have been taken from Caïro. There was quite a number of uncommon (wild and tame) ducks which explorers like Hasselquist (one of Linné sources) found in the Arab world in the first part of the 18th century or earlier.
Nowadays also cross-breed specimens of Muscovy Duck and Mallard are posted in birdfora, so the number of ugly ducks is growing; but I have also seen pictures of a French farm of Muscovy Ducks, where all the birds had a completely white plumage. Not attractive for us birders, it is like a farm of white turkeys, which I once saw in my own country. Don't know about the taste . . .
Enjoy, Jan van der Brugge
Cairina moschata (Anas moschata Linnaeus, Anas moschata J.F.Gmelin, Anas moschata Brisson, Anas moschata Latham, Moschatus moschatus Lesson, Carina moschata S.D.W., Tadorna moschata Swainson,
Cygnus moschatus Rüppell, Hyonetta moschata Sundevall, Anas sylvestris Brasiliensis Ray, Anas sylvestris Bewick, C.sylvestris Stephens, Anas maxima Gosse, Moscha carunculata, Anas Merianæ Shaw)
(Muscovy Duck, Muscovy, Musk Duck, Musky Duck, Barbary Duck [domesticated]
(Pato Criollo / Pato-do-mato)
(Muskuseend (Muskusloopeend) / Moschus-Ente, Moschusente / Canard musqué, Canard de Barbarie / Anatra muta)
[Le Canard musqué (Buffon, Histoire Naturelle Oiseaux, 9, p.162, pl.9 & Pl.Enlum. 989); (Cuvier, Règne Animal, I, p.537). Muscovy Duck (Albin, Birds, 3, pls. 97, 98); (Latham, Gen.Syn., 6, p.476; Linn.Trans. IV, p.113, pl.xiv, figs.5, 6; Syn.Sup. II, p.348); (Bewick, British Birds, II, p.320).
Common Musk-Duck (Stephens, Gen.Zool., 12, pt.2, p.79, for Cairina sylvestris). Musk Carin (S.D.W., The Analyst, III (14), Jan.1836, p.214, for Carina moschata). The Guiny-Duck, Muscovy-Duck. Muscovy Duck (Albin, Birds, 3, pl.97, 98. - Latham, Gen.Syn. 6.476 & Sup. ii. 348. - Bewick, Brit.Birds, ii. 320. - Anas Moschata (Caïrina of Fleming). (Joseph, Hist.Trinidad, 1838, p.61). Carunculated Musk-bird (Mus.Brookes, p.102, for Moscha carunculata).] [The Sudani duck (in dissertation of Egypt). Merian Duck. Anas Merianæ. (Latham, Gen.Hist. X, p.271)
Pato grande o real. (Azara, Apuntamientos, III, pp.410, 427) Pato criollo. Pato almizclado. Pato perulero. - Pato bravo. Pato do matto. Pato almizcarado. (Sp. - Port. names, Hist.Nat.Ducks, I, p.57)
Le Canard musqué (Buffon, Hist.Nat.Oiseaux 9.162. pl.9. - Buffon, Planches Enluminés, 989. - Cuvier, Règne Animal, i. 537). Canard d’Inde, Cane de Guinée ou de Barbarie. (Cuvier, Dict.sci.nat. 6, p.549)
Türckische Ente. Anas Indica s. Turcica. Canard d’Inde. (Frisch, pl.180) Die Bisamente. Anas moschata. (Meidinger, p.50; Poeppig) Türkische oder Bisamente. Anas moschata. (Gistl, Naturgesch.Thierreichs, p.96)
Die Bisamente, die Lybische Ente, Türkenente, Türkische Ente, Stummente, Barberie-Ente, Gansente, Flugente, Warzenente. (old vernacular German names)
Moskanteend. Anas Moschata. (Swinderen Index, 1822, p.22) Muskus Eend. Cairina moschata, L. Guiana, Brazilië. (List Artis p.87) Bizameend.]
Indian names: Cotua (Peru); Quayaiz (Colombia); Mairua, Oumeh (British Guiana) (Nat.Hist.Ducks, I, p.57)]
(vern. Pato real. Pato pinto. Solareno. Pato perulero. [Mexico, last name for domestic birds). Pato Criollo [Puerto Rico]. Pato real, Pato negro [Honduras]. Pato real [Venezuela, Bolivia]. Pato criollo, Pato real [Argentina].
Bragado, Ype guasu [Paraguay]. Pato-do-mato [Brasil, = wood duck]. Pato de Guiné [Islas Canarias].)