Animalia > Chordata > Aves > Anseriformes > Anatidae > Anas > Anas undulata

Anas undulata (Yellow-billed Duck)

Wikipedia Abstract

The yellow-billed duck (Anas undulata) is a 51–58 cm long dabbling duck which is an abundant resident breeder in southern and eastern Africa. This duck is not migratory, but will wander in the dry season to find suitable waters. It is highly gregarious outside the breeding season and forms large flocks. These are mallard-sized mainly grey ducks with a darker head and bright yellow bill. The wings are whitish below, and from above show a white-bordered green speculum. The male has a teal-like whistle, whereas the female has a mallard-like quack.
View Wikipedia Record: Anas undulata

Infraspecies

Anas undulata ruppelli
Anas undulata undulata (South African yellow-billed duck)

EDGE Analysis

Uniqueness Scale: Similiar (0) 
0
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
2
 Unique & Vulnerable (100)
ED Score: 1.51752
EDGE Score: 0.923276
Learn more at EDGE of Existence programme

Attributes

Adult Weight [1]  1.962 lbs (890 g)
Birth Weight [2]  55 grams
Female Weight [1]  1.808 lbs (820 g)
Male Weight [1]  2.116 lbs (960 g)
Weight Dimorphism [1]  17.1 %
Diet [3]  Carnivore (Invertebrates), Granivore, Herbivore
Diet - Invertibrates [3]  30 %
Diet - Plants [3]  50 %
Diet - Seeds [3]  20 %
Forages - Ground [3]  50 %
Forages - Water Surface [3]  50 %
Clutch Size [5]  7
Clutches / Year [1]  1
Fledging [1]  68 days
Incubation [4]  28 days
Maximum Longevity [4]  29 years
Snout to Vent Length [1]  22 inches (55 cm)

Ecoregions

Protected Areas

Important Bird Areas

Name Location  IBA Criteria   Website   Climate   Land Use 
Barberspan and Leeupan South Africa A1, A4i, A4ii, A4iii
De Hoop Nature Reserve South Africa A1, A2, A3, A4i, A4iii
Grassland Biosphere Reserve (proposed) South Africa A1, A2, A3, A4i, A4ii, A4iii
Lake St Lucia and Mkuze swamps South Africa A1, A2, A3, A4i, A4iii

Biodiversity Hotspots

Consumers

Range Map

External References

Citations

Attributes / relations provided by
♦ 1Nathan 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
♦ 2Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
♦ 3Hamish 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
♦ 4del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ 5Jetz 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
♦ 6Gibson, 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 https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0