It is closely related to the North American Eskimo curlew. The Eskimo curlew was a New World bird. Some species might be extinct in Brazil, like the Glaucous macaw and the Eskimo curlew. Endangered birds include yellow cardinal ("Gubernatrix cristata") and Eskimo curlew (Numenius borealis). Carolina parakeet, passenger pigeon, Labrador duck, great auk, pinnated grouse, and, possibly, the Eskimo curlew.