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As indicated by its name, this is a large white swan with a black neck. A red knob or carbuncle at the base of the upper mandible is enlarged in males at breeding season. The black-necked swan has short wings, but still is a fast flyer. Swan parents will carry cygnets on their back while swimming, enabling the parents to regain weight lost to the rigors of mating, egg laying, incubation, simultaneous feeding, and brooding. This practice also provides protection for the downy cygnets. The black-necked swan is the largest South American waterfowl.
Breeding Pair(1yr+): $1850
Juvenile pair: $1200
Cygnets 6weeks (unsexed): $350 each




BREED DETAILS- BLACKNECK SWAN -(cygnus melancoryphus)
Black-necked swans are the smallest members of the genus Cygnus, ranging in length from 102 cm to 124 cm. Males range in mass from 4.5 kg to 6.7 kg, and females from 3.5 to 4.4 kg. Wingspan also differs between the sexes, where male wingspan range is 435 to 450 mm, in females it is 400 to 415 mm .Black-necked swans are monogamous and males and females mate for life.If one of them should die, the surviving mate will find a new mate. Breeding season begins in July and extends to September and November .Black-necked swans breed between July and the autumn months. They can breed as many as three times during the mating season. Clutch sizes range from 3 to 7 eggs, with the mean being 4.6 eggs.It takes between 34 and 37 days for an egg to hatch, with the average being 35 daysAverage age at sexual or reproductive maturity (male) -;2 years.Average eggs per season ;4.6 Range eggs per season ;3 to 7