Animalia > Chordata > Aves > Anseriformes > Anatidae > Anas > Anas strepera

Anas strepera (Gadwall)

Synonyms: Chaulelasmus strepera; Mareca strepera (homotypic); Mareca strepera strepera
Language: French; Spanish

Wikipedia Abstract

The gadwall (Anas strepera) is one of the most common and widespread dabbling ducks in the family Anatidae. It usually frequents Wetlands and dabbles for food.
View Wikipedia Record: Anas strepera


Anas strepera couesi (Coue's gadwall)
Anas strepera strepera (Common gadwall)

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 2.49941
EDGE Score: 1.25259


Adult Weight [1]  1.746 lbs (792 g)
Birth Weight [3]  36 grams
Female Weight [6]  1.909 lbs (866 g)
Male Weight [6]  2.134 lbs (968 g)
Weight Dimorphism [6]  11.8 %
Breeding Habitat [2]  Prairie wetlands, Freshwater marshes
Wintering Geography [2]  Widespread U.S./Mexico
Wintering Habitat [2]  Wetlands
Diet [4]  Granivore, Herbivore
Diet - Plants [4]  70 %
Diet - Seeds [4]  30 %
Forages - Ground [4]  20 %
Forages - Water Surface [4]  80 %
Clutch Size [7]  10
Clutches / Year [3]  1
Fledging [5]  50 days
Global Population (2017 est.) [2]  3,100,000
Incubation [3]  26 days
Mating Display [8]  Ground display
Maximum Longevity [3]  22 years
Snout to Vent Length [5]  20 inches (52 cm)
Wing Span [9]  35 inches (.9 m)
Female Maturity [3]  8 months
Male Maturity [3]  8 months


Protected Areas

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Important Bird Areas

Biodiversity Hotspots

Prey / Diet



Range Map

External References

NatureServe Explorer


Attributes / relations provided by
1Storchová, Lenka; Hořák, David (2018), Data from: Life-history characteristics of European birds, Dryad, Dataset,
2Partners in Flight Avian Conservation Assessment Database, version 2017. Accessed on January 2018.
3de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774
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
5Nathan 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
6Leschack, CR, SK Mcknight, and GR Hepp. 1997. Gadwall (Anas strepera). In The Birds of North America, no. 283 (A. Poole and F. Gill, Eds.). Academy of Natural Sciences, Philadelphia, and American Ornithologists' Union, Washington, DC
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
8Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
9British Trust for Ornithology
10Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
11Feeding ecology of North American gopher snakes (Pituophis catenifer, Colubridae), JAVIER A. RODRÍGUEZ-ROBLES, Biological Journal of the Linnean Society, 2002, 77, 165–183
12Spermophilus franklinii, Andrea C. Ostroff and Elmer J. Finck, MAMMALIAN SPECIES No. 724, pp. 1–5 (2003)
13Gibson, 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