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The Muscovy duck (Cairina moschata ... Females are noticeably smaller, and only grow to 3 kg (6.6 lb), roughly half the males' size. The bird is predominantly black ...
The Muscovy is commonly reared for meat. [4]: 78 Mulards from the crossing of a Muscovy duck (Cairina moschata) and a wild-type mallard (Anas platyrhynchos)In commercial production, it is often crossed with a mallard-derived domestic duck such as the Rouen or Pekin to produce the hybrid known as a mulard.
The largest 'duck' species is the Muscovy duck (Cairina moschata) of the Americas. Males can weigh from 4.5–6.3 kg (9.9–13.9 lb) and can measure up to 86 cm (34 in). [59] However, its genus is now considered to be paraphyletic with the species currently being placed in the subfamily Tadorninae (shelducks and shelgeese).
The White Muscovy and the Pekin are the two most common purebred, commercially farmed ducks. Hybrids of the two are hardier and calmer, in addition to exhibiting natural hybrid vigor. [2] The incubation period of the hybrid eggs is between the mallard and Muscovy, with an average of 32 days. About half of the eggs hatch into mulard ducks.
Unlike geese, Muscovy ducks aren't aggressive however. In fact the opposite is true. These guys are actually quite affectionate. They're happy sitting on their owner's lap or resting by their feet.
Almost all domestic duck breeds derive from the mallard, with the exception of a few Muscovy breeds, [146] and are listed under the trinomial name A. p. domesticus. Mallards are generally monogamous while domestic ducks are mostly polygamous. Domestic ducks have no territorial behaviour and are less aggressive than mallards. [147]
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Some troops leave the battlefield injured. Others return from war with mental wounds. Yet many of the 2 million Iraq and Afghanistan veterans suffer from a condition the Defense Department refuses to acknowledge: Moral injury.