page_title: List of birds of Costa Rica
section_title: Ducks, geese, and waterfowl
hierarchical_section_title: List of birds of Costa Rica / Ducks, geese, and waterfowl
caption_attribution_description: English: Red-billed Whistling Duck at Slimbridge Wildfowl and Wetlands Centre, Gloucestershire, England. Taken by Adrian Pingstone in June 2003 and released to the public domain.
context_page_description: Although Costa Rica is a small country, it is in the bird-rich neotropical region and has a huge number of species for its area. The official bird list published by the Costa Rican Rare Birds and Records Committee of the Asociación Ornitológica de Costa Rica contained 922 species as of August 2019. This number is more than have been recorded in all of the 49 mainland United States and Canada combined. Of those species, seven are endemic, 69 are rare or accidental, and four have been introduced by humans. Another 73 are near-endemic with ranges that include only Costa Rica and Panama. Twenty-seven species, including five of the seven endemics, are globally vulnerable or endangered. Over an area of 51,100 km², an area smaller than West Virginia, this is the greatest density of bird species of any continental American country. About 600 species are resident, with most of the other regular visitors being winter migrants from North America.
  Costa Rica's geological formation played a large role in the diversification of avian species.
context_section_description: Order: Anseriformes   Family: Anatidae
  Anatidae includes the ducks and most duck-like waterfowl, such as geese and swans. These birds are adapted to an aquatic existence with webbed feet, flattened bills, and feathers that are excellent at shedding water due to an oily coating.
  White-faced whistling-duck, Dendrocygna viduata (R?)
  Black-bellied whistling-duck, Dendrocygna autumnalis
  Fulvous whistling-duck, Dendrocygna bicolor
  Comb duck, Sarkidiornis silvicola (A)
  Muscovy duck, Cairina moschata
  Blue-winged teal, Spatula discors
  Cinnamon teal, Spatula cyanoptera
  Northern shoveler, Spatula clypeata
  American wigeon, Mareca americana
  Mallard, Anas platyrhynchos
  White-cheeked pintail, Anas bahamensis (A)
  Northern pintail, Anas acuta
  Green-winged teal, Anas crecca
  Canvasback, Aythya valisineria (A)
  Redhead, Aythya americana (A)
  Ring-necked duck, Aythya collaris
  Greater scaup, Aythya marila (A)
  Lesser scaup, Aythya affinis
  Hooded merganser, Lophodytes cucullatus (A)
  Red-breasted Merganser, Mergus serrator (A)
  Masked duck, Nomonyx dominicus
  Ruddy duck, Oxyura jamaicensis (A)
caption: Black-bellied whistling-duck
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