Animalia > Chordata > Aves > Anseriformes > Anatidae > Cygnus > Cygnus melancoryphus

Cygnus melancoryphus (Black-necked Swan)

Synonyms: Anas melancorypha; Anas spec; Cygnus melanocorypha; Cygnus melanocorypha melanocorypha; Cygnus melanocoryphus

Wikipedia Abstract

The black-necked swan (Cygnus melancoryphus) is a swan that is the largest waterfowl native to South America.
View Wikipedia Record: Cygnus melancoryphus

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 10.3146
EDGE Score: 2.4261


Clutch Size [7]  6
Clutches / Year [2]  1
Fledging [2]  70 days
Incubation [6]  35 days
Mating System [3]  Monogamy
Maximum Longevity [2]  30 years
Migration [8]  Intracontinental
Snout to Vent Length [2]  3.706 feet (113 cm)
Water Biome [1]  Lakes and Ponds, Coastal, Brackish Water
Adult Weight [2]  10.527 lbs (4.775 kg)
Birth Weight [3]  247 grams
Female Weight [5]  8.819 lbs (4.00 kg)
Male Weight [5]  12.236 lbs (5.55 kg)
Weight Dimorphism [5]  38.8 %
Diet [4]  Carnivore (Invertebrates), Herbivore
Diet - Invertibrates [4]  10 %
Diet - Plants [4]  90 %
Forages - Water Surface [4]  100 %
Female Maturity [2]  2 years
Male Maturity [2]  2 years


Name Countries Ecozone Biome Species Report Climate Land
Chilean matorral Chile Neotropic Mediterranean Forests, Woodlands, and Scrub
Uruguayan savanna Uruguay, Brazil, Argentina Neotropic Tropical and Subtropical Grasslands, Savannas, and Shrublands

Protected Areas

Important Bird Areas

Biodiversity Hotspots

Name Location Endemic Species Website
Chilean Winter Rainfall-Valdivian Forests Chile No

Prey / Diet

Elodea densa (Brazilian waterweed)[6]


Parasitized by 
Baruscapillaria obsignata[9]
Cloacotaenia megalops[9]
Epomidiostomum vogelsangi[9]

Range Map

External References


Attributes / relations provided by
1Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at
2Nathan P. Myhrvold, Elita Baldridge, Benjamin Chan, Dhileep Sivam, Daniel L. Freeman, and S. K. Morgan Ernest. 2015. An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96:3109
3Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
4Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
5Humphrey, PS, D. Bridge, PW Reynolds, and RT Peterson. 1970. Birds of Isla Grande (Tierra del Fuego). Preliminary Smithsonian Manual. Smithsonian Institution, Washington, DC
6del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
7Jetz W, Sekercioglu CH, Böhning-Gaese K (2008) The Worldwide Variation in Avian Clutch Size across Species and Space PLoS Biol 6(12): e303. doi:10.1371/journal.pbio.0060303
8Riede, Klaus (2004) Global Register of Migratory Species - from Global to Regional Scales. Final Report of the R&D-Projekt 808 05 081. 330 pages + CD-ROM
9Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0