Harlequin duck abundance - Gros Morne

In eastern Canada, Harlequin ducks are uncommon and are listed by COSEWIC as a species of special concern. Resident of fast flowing-rivers and streams during the breeding season, their presence and abundance reflects the health of these ecosystems. The park censuses harlequin ducks on four rivers and streams of Gros Morne National Park; the Spring breeding survey is done in 1 day of helicopter surveys, every 5 years in May.

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