Scientific Name: Bucephala clangula
Global
1% of the global population estimate. This threshold is used to identify trigger species and IBAs under categories A4i/ii and A4iv.
Regional/Continental
1% of the regional/continental population estimate.
| West End of Lake Ontario (ON022) | ||
|---|---|---|
| Number | Year | Season |
| 5,067 | 2013 | Winter |
| 4,357 | 2012 | Winter |
| 7,444 | 2011 | Winter |
| 3,969 | 2010 | Winter |
| 9,756 | 2003 | Winter |
| 12,000 | 1998 | Winter |
| 30,000 | 1997 | Winter |
| 8,700 | 1994 | Winter |
| 5,000 | 1993 | Spring |
| 5,000 | 1992 | Fall |
| Cumberland Marshes (SK102) | ||
|---|---|---|
| Number | Year | Season |
| 14,000 | 1972 | Summer |
| Dundas Valley and Dundas Marsh (ON005) | ||
|---|---|---|
| Number | Year | Season |
| 10,456 | 1997 | Winter |
| Point Pelee (ON006) | ||
|---|---|---|
| Number | Year | Season |
| 8,000 | 2005 | Winter |
| Prince Edward County South Shore (ON003) | ||
|---|---|---|
| Number | Year | Season |
| 7,884 | 1996 | Winter |