The Eskimo Curlew was once a common sight at stopover locations in the Great Plains in spring and in Atlantic Canada in fall. It bred in the tundra of the Northwest Territories and wintered in the pampas of Argentina, but has not been observed in either region since the mid-20th century (Environment Canada, 2007). The last confirmed sighting of the species anywhere was a bird shot in Barbados in 1963. Although other sightings have been reported since, none have been conclusively identified as Eskimo Curlew, and are generally thought to be misidentifications of Whimbrel or other shorebirds similar in appearance (Environment Canada, 2007). One study estimated the likelihood that the species still exists at 0.0003% (Elphick et al., 2010). Eskimo Curlew was first assessed as Endangered by the Committee on the Status of Wildlife in Canada in 1978 (COSEWIC, 2009), and it has been listed as Endangered under the Species at Risk Act since 2003.