Canvasback
Scientific Name: Aythya valisineria
Thresholds:
- Old Wives-Frederick Lakes (SK031)63,000 (max.)
- Long Point Peninsula and Marshes (ON001)51,766 (max.)
- Utikuma and Utikumasis Lakes (AB054)40,000 (max.)
- Cumberland Marshes (SK102)30,000 (max.)
- Eastern Lake St. Clair (ON012)25,800 (max.)
- Lower Detroit River (ON047)16,931 (max.)
- Niagara River Corridor (ON002)14,000 (max.)
- Beaver Lake (NT084)8,000 (max.)
- Holiday Beach / Big Creek Conservation Area (ON034)8,000 (max.)
- Wolfe Island (ON037)7,500 (max.)
- Presqu'ile Provincial Park (ON004)6,300 (max.)
- Reed Lake (SK034)5,500 (max.)
- Norfolk Forest Complex (ON009)5,000 (max.)
- Luck Lake (SK003)4,500 (max.)
- Greater Rondeau Area (ON007)4,000 (max.)
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.
| Old Wives-Frederick Lakes (SK031) | ||
|---|---|---|
| Number | Year | Season |
| 63,000 | 1984 | Summer |
| Long Point Peninsula and Marshes (ON001) | ||
|---|---|---|
| Number | Year | Season |
| 7,800 - 9,600 | 2020 | Fall |
| 5,000 | 2019 | Fall |
| 4,000 - 5,000 | 2019 | Spring |
| 3,924 - 4,000 | 2018 | Fall |
| 5,000 - 16,000 | 2018 | Spring |
| 4,070 - 7,820 | 2017 | Fall |
| 4,000 - 8,000 | 2017 | Winter |
| 5,000 - 9,000 | 2016 | Fall |
| 4,000 - 5,182 | 2015 | Winter |
| 5,000 | 2015 | Fall |
| 4,500 | 2015 | Spring |
| 5,000 | 2014 | Spring |
| 5,000 | 2013 | Fall |
| 5,000 | 2012 | Fall |
| 5,000 - 7,500 | 2012 | Spring |
| 7,000 - 25,000 | 2012 | Winter |
| 4,000 | 2011 | Spring |
| 4,480 | 2007 | Winter |
| 7,023 - 7,200 | 2006 | Winter |
| 4,000 | 2006 | Spring |
| 5,000 - 18,000 | 1999 | Fall |
| 4,457 - 51,766 | 1998 | Winter |
| 5,617 - 33,309 | 1998 | Fall |
| 5,529 - 29,836 | 1998 | Spring |
| 14,000 - 35,000 | 1997 | Fall |
| 12,000 - 25,000 | 1996 | Fall |
| 8,000 - 15,000 | 1995 | Fall |
| 8,000 - 25,000 | 1994 | Fall |
| 5,000 | 1994 | Spring |
| 4,701 | 1993 | Winter |
| 9,000 - 41,865 | 1993 | Fall |
| 4,500 | 1992 | Winter |
| 6,000 | 1990 | Fall |
| Utikuma and Utikumasis Lakes (AB054) | ||
|---|---|---|
| Number | Year | Season |
| 40,000 | 1975 | Summer |
| Cumberland Marshes (SK102) | ||
|---|---|---|
| Number | Year | Season |
| 30,000 | 1972 | Summer |
| Eastern Lake St. Clair (ON012) | ||
|---|---|---|
| Number | Year | Season |
| 4,800 | 2020 | Spring |
| 7,000 | 2018 | Winter |
| 12,000 | 2015 | Spring |
| 12,000 | 2014 | Spring |
| 16,903 | 2012 | Winter |
| 8,000 | 2007 | Spring |
| 25,800 | 2007 | Winter |
| 19,215 | 2004 | Spring |
| 19,215 | 2004 | Winter |
| 5,000 | 2002 | Winter |
| Lower Detroit River (ON047) | ||
|---|---|---|
| Number | Year | Season |
| 4,000 - 7,970 | 2020 | Winter |
| 7,760 - 10,000 | 2019 | Winter |
| 5,000 - 16,931 | 2018 | Winter |
| 4,000 - 10,200 | 2017 | Winter |
| 9,000 | 2015 | Winter |
| 5,935 | 2014 | Winter |
| 2,265 | 2013 | Winter |
| 5,084 | 2010 | Winter |
| 2,020 | 2009 | Winter |
| 8,365 | 2007 | Winter |
| 4,193 | 2006 | Winter |
| 5,287 | 2005 | Winter |
| 9,999 | 2000 | Winter |
| 3,026 - 7,756 | 1997 | Winter |
| 14,003 | 1996 | Winter |
| 3,140 | 1995 | Winter |
| 918 - 11,067 | 1994 | Winter |
| 5,339 - 6,203 | 1993 | Winter |
| Niagara River Corridor (ON002) | ||
|---|---|---|
| Number | Year | Season |
| 4,000 | 2021 | Winter |
| 4,300 - 9,000 | 2020 | Winter |
| 9,100 | 2018 | Winter |
| 5,700 | 2013 | Winter |
| 1,500 - 4,226 | 2011 | Winter |
| 3,500 | 2010 | Winter |
| 7,176 | 2009 | Winter |
| 1,000 | 2003 | Winter |
| 6,000 - 14,000 | 1997 | Winter |
| Beaver Lake (NT084) | ||
|---|---|---|
| Number | Year | Season |
| 8,000 | 1975 | Fall |
| Holiday Beach / Big Creek Conservation Area (ON034) | ||
|---|---|---|
| Number | Year | Season |
| 5,000 - 10,000 | 2020 | Fall |
| 4,300 | 2018 | Winter |
| 6,000 - 8,000 | 2018 | Fall |
| 850 | 1996 | Fall |
| Wolfe Island (ON037) | ||
|---|---|---|
| Number | Year | Season |
| 7,500 | 1995 | Spring |
| Presqu'ile Provincial Park (ON004) | ||
|---|---|---|
| Number | Year | Season |
| 6,300 | 2003 | Spring |
| 4,000 | 1997 | Spring |
| 5,006 | 1993 | Spring |
| Reed Lake (SK034) | ||
|---|---|---|
| Number | Year | Season |
| 5,500 | 1995 | Fall |
| Norfolk Forest Complex (ON009) | ||
|---|---|---|
| Number | Year | Season |
| 5,000 | 2012 | Spring |
| Luck Lake (SK003) | ||
|---|---|---|
| Number | Year | Season |
| 4,500 | 2016 | Fall |
| Greater Rondeau Area (ON007) | ||
|---|---|---|
| Number | Year | Season |
| 4,000 | 2020 | Spring |
| 4,000 | 2016 | Winter |
| 3,400 | 1995 | Spring |