Aythya valisineria

Accidental in the Pribilofs this species has been recorded in the Pribilofs only three times. The first sighting was of a male on May 18, 1917. Subsequent sightings all occurred during spring, in 1977, and 2005. If a visiting birder thinks that they have located a Canvasback in one of Saint Paul’s many freshwater lakes they should make certain to rule out the more commonly occurring Common Pochard. Likely the most reliable feature that can be used to separate these two species is the bill shape and pattern. Common Pochards have a blue saddle in the center of their black bill, whereas Canvasbacks have all dark bills. In addition the Canvasback’s bill is longer and straighter than that of Common Pochard.