Red-breasted Merganser

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IBAs

Red-breasted Merganser

Scientific Name: Mergus serrator

Cornell Lab of Ornithology

Thresholds:

GlobalInformation5,600
Regional/ContinentalInformation2,500

Hosted by Bird Studies Canada

Holiday Beach / Big Creek Conservation Area (ON034)195,000 (max.)
Point Pelee (ON006)87,000 (max.)
Long Point Peninsula and Marshes (ON001)30,000 (max.)
Greater Rondeau Area (ON007)17,900 (max.)
Eastern Lake St. Clair (ON012)16,256 (max.)
Presqu'ile Provincial Park (ON004)15,000 (max.)
Dundas Valley and Dundas Marsh (ON005)10,540 (max.)
Niagara River Corridor (ON002)9,000 (max.)
Pelee Island Natural Areas (ON013)9,000 (max.)
Wolfe Island (ON037)8,449 (max.)
Boundary Bay - Roberts Bank - Sturgeon Bank (Fraser River Estuary) (BC017)6,700 (max.)
West End of Lake Ontario (ON022)6,357 (max.)
Prince Edward County South Shore (ON003)6,000 (max.)
Leslie Street Spit (ON038)4,000 (max.)
Île aux Basques et Les Razades (QC046)3,500 (max.)
Baie Comeau (QC082)3,000 (max.)
Barre de Portneuf (QC083)2,500 (max.)
La Malbaie–Pointe-au-Pic (QC094)2,400 (max.)
Banc de Carleton (QC030)2,000 (max.)
Churchill & Vicinity (MB003)2,000 (max.)

Hosted by Bird Studies Canada

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.

Holiday Beach / Big Creek Conservation Area (ON034)
Number	Year	Season
195,000	1992	Fall

Point Pelee (ON006)
Number	Year	Season
9,000 - 20,000	2020	Fall
2,200	2019	Winter
2,200 - 8,200	2019	Fall
3,400 - 10,000	2018	Fall
4,000 - 5,500	2017	Fall
6,500 - 10,000	2016	Fall
4,000	2016	Spring
3,846	2015	Winter
4,000 - 13,300	2015	Fall
2,000 - 10,000	2014	Fall
2,000 - 3,000	2014	Spring
5,000 - 80,000	2013	Fall
2,000 - 2,500	2013	Spring
3,185	2013	Winter
4,000	2012	Winter
15,000 - 50,000	2012	Fall
4,000	2012	Spring
2,000 - 13,500	2011	Winter
18,000 - 20,000	2011	Fall
2,000 - 50,000	2010	Fall
2,000 - 54,000	2009	Fall
2,000 - 3,000	2009	Spring
2,400	2008	Winter
2,700	2008	Fall
2,000 - 7,000	2008	Spring
12,000	2007	Fall
2,000 - 5,000	2007	Spring
2,000 - 3,000	2006	Winter
2,000	2006	Fall
2,300	2005	Winter
14,000 - 87,000	2004	Fall
3,100 - 19,000	2003	Fall
12,000	2002	Fall
9,000	2001	Fall
3,000 - 22,000	1998	Fall
1,900	1997	Winter
18,000	1997	Fall
2,800	1996	Winter
6,000 - 7,500	1996	Spring
4,500	1995	Winter
15,000	1995	Fall
2,000 - 45,000	1992	Fall
3,000	1990	Fall

Long Point Peninsula and Marshes (ON001)
Number	Year	Season
5,000	2018	Fall
4,500 - 20,093	2016	Fall
2,000 - 5,541	2015	Fall
1,926 - 6,910	2014	Fall
2,500	2014	Spring
15,000 - 30,000	2013	Fall
1,990	2013	Spring
2,809	2012	Winter
2,648 - 10,350	2012	Fall
2,183	2011	Winter
2,725 - 11,916	2011	Fall
2,580 - 9,000	2010	Fall
3,002 - 3,030	2009	Fall
2,326	2009	Spring
2,310 - 3,760	2008	Fall
2,800 - 11,121	2007	Fall
3,280 - 7,246	2007	Spring
5,591	2006	Winter
1,880 - 4,900	2006	Fall
2,000	2006	Spring
2,004	2005	Winter
3,644	1998	Fall
2,970	1998	Winter
3,500	1996	Fall
2,500 - 4,000	1990	Fall

Greater Rondeau Area (ON007)
Number	Year	Season
2,000	2021	Spring
2,810	2021	Winter
2,125 - 3,450	2020	Winter
3,100 - 14,800	2020	Fall
6,400 - 6,505	2019	Winter
7,050 - 17,900	2019	Fall
2,000 - 12,000	2018	Fall
2,085 - 3,500	2017	Fall
3,000	2016	Fall
2,500 - 7,600	2015	Fall
2,000	2012	Spring
5,000	2010	Spring
3,000	2008	Spring
3,000	2007	Fall

Eastern Lake St. Clair (ON012)
Number	Year	Season
9,238	2009	Winter
16,256	2006	Winter
2,256	2004	Winter
2,015	2000	Winter
3,096	1998	Winter
4,006	1997	Winter
2,306	1993	Winter
4,540	1992	Winter

Presqu'ile Provincial Park (ON004)
Number	Year	Season
2,000	2016	Fall
2,000 - 15,000	2012	Fall
5,000	2011	Fall
5,000	2008	Fall
2,000 - 2,500	2002	Fall
2,000 - 10,000	1999	Fall

Dundas Valley and Dundas Marsh (ON005)
Number	Year	Season
10,540	2011	Fall
9,965	2009	Fall

Niagara River Corridor (ON002)
Number	Year	Season
3,000	2015	Fall
2,000	2014	Spring
3,000	2013	Fall
1,748	2012	Winter
2,000 - 9,000	2011	Fall
2,500	2011	Winter
4,100	2006	Fall
6,000	2000	Winter

Pelee Island Natural Areas (ON013)
Number	Year	Season
3,500	2014	Spring
2,170 - 3,045	2011	Fall
5,000 - 9,000	2011	Spring
2,920 - 3,840	2005	Fall
2,650	2004	Fall

Wolfe Island (ON037)
Number	Year	Season
2,000	2020	Winter
8,449	2014	Winter
6,950	2012	Winter
3,542	2011	Winter

Boundary Bay - Roberts Bank - Sturgeon Bank (Fraser River Estuary) (BC017)
Number	Year	Season
5,000	2001	Spring
2,120	2001	Winter
6,700	2000	Spring

West End of Lake Ontario (ON022)
Number	Year	Season
2,200 - 5,000	2020	Fall
3,390	2020	Spring
1,999 - 4,312	2019	Spring
3,050	2019	Winter
2,000 - 3,100	2018	Fall
5,126	2018	Spring
2,000	2017	Fall
2,103	2017	Spring
3,500	2015	Fall
2,000	2014	Fall
3,000	2013	Fall
3,196	2013	Winter
5,000 - 6,000	2012	Fall
1,778	2012	Winter
6,419	2011	Winter
2,163 - 3,592	2010	Winter
5,000	2010	Fall
4,000 - 6,000	2009	Fall
3,000 - 4,000	2008	Fall
3,000	2007	Fall
5,000	2004	Fall
2,000	1990	Fall

Prince Edward County South Shore (ON003)
Number	Year	Season
2,000	2012	Spring
6,000	2005	Fall

Leslie Street Spit (ON038)
Number	Year	Season
2,000 - 3,000	2019	Fall
4,000	2010	Fall

Île aux Basques et Les Razades (QC046)
Number	Year	Season
2,500 - 3,500	2002	Fall
2,000	1995	Fall
2,000	1990	Fall

Baie Comeau (QC082)
Number	Year	Season
3,000	1985	Spring
2,000	1983	Spring

Barre de Portneuf (QC083)
Number	Year	Season
2,500	2013	Spring

La Malbaie–Pointe-au-Pic (QC094)
Number	Year	Season
2,400	1999	Spring

Banc de Carleton (QC030)
Number	Year	Season
2,000	1984	Winter

Churchill & Vicinity (MB003)
Number	Year	Season
2,000	2012	Summer