Bonaparte's Gull
Scientific Name: Chroicocephalus philadelphia
Thresholds:
- Niagara River Corridor (ON002)100,000 (max.)
- Quoddy Region (NB037)25,000 (max.)
- Long Point Peninsula and Marshes (ON001)20,000 (max.)
- Greater Rondeau Area (ON007)15,000 (max.)
- Point Pelee (ON006)15,000 (max.)
- Prince Edward County South Shore (ON003)15,000 (max.)
- Little Qualicum Estuary to Nanoose Bay (BC056)12,500 (max.)
- Active Pass (BC015)10,000 (max.)
- Amherst Island (ON062)8,000 (max.)
- Baie Comeau (QC082)8,000 (max.)
- Tadoussac (QC085)7,500 (max.)
- Delta Marsh (MB001)6,710 (max.)
- Baie des Escoumins et Grandes-Bergeronnes (QC084)6,000 (max.)
- Grand Manan Archipelago (NB011)6,000 (max.)
- Boundary Bay - Roberts Bank - Sturgeon Bank (Fraser River Estuary) (BC017)5,500 (max.)
- Presqu'ile Provincial Park (ON004)5,000 (max.)
- Pelee Island Natural Areas (ON013)4,000 (max.)
- Eastern Lake St. Clair (ON012)3,849 (max.)
- White Islets and Wilson Creek (BC025)3,500 (max.)
- Grande Prairie - Trumpeter Swan IBA (AB107)3,370 (max.)
- Machias Seal Island (NB019)3,000 (max.)
- Netley-Libau Marsh (MB009)3,000 (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.
| Niagara River Corridor (ON002) | ||
|---|---|---|
| Number | Year | Season |
| 4,750 | 2021 | Spring |
| 3,375 - 5,500 | 2021 | Winter |
| 3,887 - 7,000 | 2020 | Winter |
| 3,250 - 3,800 | 2020 | Fall |
| 3,000 - 7,047 | 2019 | Winter |
| 4,500 - 6,354 | 2019 | Fall |
| 7,263 | 2018 | Fall |
| 3,316 - 6,574 | 2017 | Winter |
| 4,000 - 6,983 | 2017 | Fall |
| 3,500 - 9,313 | 2016 | Winter |
| 3,000 - 3,146 | 2016 | Fall |
| 4,216 - 8,000 | 2015 | Winter |
| 7,200 - 11,714 | 2015 | Fall |
| 4,485 | 2014 | Fall |
| 4,200 - 5,573 | 2013 | Winter |
| 3,200 - 10,000 | 2013 | Fall |
| 7,905 - 8,000 | 2013 | Spring |
| 3,412 - 12,000 | 2012 | Winter |
| 9,663 | 2012 | Spring |
| 3,946 - 10,000 | 2011 | Winter |
| 4,000 - 8,000 | 2011 | Fall |
| 4,000 - 10,000 | 2010 | Winter |
| 5,000 - 30,000 | 2010 | Fall |
| 7,000 | 2010 | Spring |
| 7,600 - 70,000 | 2009 | Winter |
| 3,500 - 70,000 | 2009 | Fall |
| 3,599 | 2008 | Winter |
| 3,000 - 5,197 | 2008 | Fall |
| 4,000 - 5,240 | 2007 | Winter |
| 3,228 - 6,000 | 2006 | Winter |
| 4,000 - 10,000 | 2006 | Fall |
| 5,000 - 10,000 | 2005 | Fall |
| 3,000 - 3,769 | 2004 | Winter |
| 5,000 | 2004 | Fall |
| 3,000 - 10,000 | 2003 | Winter |
| 4,580 - 4,600 | 2003 | Fall |
| 3,192 - 50,000 | 2002 | Winter |
| 4,950 | 2002 | Spring |
| 4,140 - 10,000 | 2001 | Winter |
| 5,000 | 2001 | Fall |
| 3,000 - 15,500 | 2000 | Winter |
| 3,000 - 10,875 | 2000 | Fall |
| 4,100 - 15,000 | 1999 | Winter |
| 3,000 | 1999 | Fall |
| 4,240 | 1999 | Spring |
| 3,920 - 10,620 | 1998 | Winter |
| 4,550 | 1998 | Fall |
| 4,250 | 1998 | Spring |
| 6,215 - 12,440 | 1997 | Winter |
| 11,200 - 50,000 | 1997 | Spring |
| 8,000 - 20,318 | 1996 | Winter |
| 16,270 | 1996 | Spring |
| 10,134 - 20,000 | 1995 | Winter |
| 5,000 - 100,000 | 1995 | Fall |
| 22,468 | 1994 | Winter |
| 3,100 - 4,000 | 1993 | Winter |
| 5,000 - 10,000 | 1992 | Winter |
| 3,000 - 40,000 | 1991 | Winter |
| 5,500 - 40,000 | 1990 | Winter |
| 6,400 | 1990 | Fall |
| 50,000 | 1979 | Fall |
| Quoddy Region (NB037) | ||
|---|---|---|
| Number | Year | Season |
| 4,000 | 2021 | Fall |
| 3,000 - 5,000 | 2020 | Fall |
| 4,000 - 5,000 | 2019 | Fall |
| 3,000 - 5,000 | 2018 | Fall |
| 3,000 | 2017 | Fall |
| 5,000 | 2017 | Summer |
| 3,000 | 2016 | Fall |
| 5,000 | 2015 | Fall |
| 4,000 - 5,000 | 2014 | Fall |
| 3,000 - 5,000 | 2012 | Fall |
| 3,000 | 2011 | Winter |
| 3,000 - 6,000 | 2011 | Fall |
| 6,000 | 2010 | Fall |
| 6,000 | 2008 | Fall |
| 4,000 | 2005 | Fall |
| 670 | 1999 | Winter |
| 6,030 | 1998 | Winter |
| 3,500 - 5,300 | 1998 | Fall |
| 25,000 | 1997 | Fall |
| 10,000 | 1985 | Fall |
| Long Point Peninsula and Marshes (ON001) | ||
|---|---|---|
| Number | Year | Season |
| 4,570 - 10,580 | 2021 | Fall |
| 3,367 - 6,665 | 2021 | Spring |
| 4,415 - 5,070 | 2020 | Fall |
| 3,000 - 6,390 | 2020 | Spring |
| 5,000 - 6,440 | 2017 | Fall |
| 3,500 - 9,020 | 2016 | Fall |
| 3,005 - 4,200 | 2015 | Fall |
| 6,000 - 6,026 | 2014 | Fall |
| 3,000 | 2014 | Spring |
| 5,016 - 11,200 | 2013 | Fall |
| 3,680 - 8,700 | 2012 | Fall |
| 4,205 - 9,000 | 2011 | Fall |
| 3,500 - 3,700 | 2011 | Spring |
| 5,250 - 10,600 | 2010 | Fall |
| 3,322 | 2010 | Spring |
| 3,200 - 4,191 | 2009 | Fall |
| 3,008 - 5,267 | 2009 | Spring |
| 3,100 - 4,900 | 2008 | Fall |
| 3,040 - 13,034 | 2007 | Fall |
| 4,000 - 5,600 | 2006 | Fall |
| 3,454 - 8,810 | 2005 | Fall |
| 3,000 - 7,500 | 2004 | Fall |
| 6,000 | 2002 | Fall |
| 3,200 - 3,500 | 1999 | Fall |
| 3,800 | 1999 | Spring |
| 8,000 | 1998 | Fall |
| 3,000 - 3,500 | 1997 | Fall |
| 3,002 | 1997 | Spring |
| 5,000 | 1996 | Fall |
| 3,000 - 20,000 | 1995 | Spring |
| 3,000 - 15,000 | 1994 | Fall |
| 3,100 | 1994 | Spring |
| 3,000 - 6,000 | 1993 | Fall |
| 3,000 - 3,200 | 1993 | Spring |
| 4,300 - 4,500 | 1992 | Fall |
| 8,000 - 20,000 | 1992 | Spring |
| 4,000 - 17,000 | 1991 | Fall |
| 4,500 - 6,000 | 1991 | Spring |
| 3,000 - 10,000 | 1990 | Fall |
| Greater Rondeau Area (ON007) | ||
|---|---|---|
| Number | Year | Season |
| 5,000 | 2017 | Fall |
| 4,500 | 2016 | Fall |
| 4,000 | 2016 | Spring |
| 3,000 - 6,000 | 2015 | Fall |
| 15,000 | 2014 | Fall |
| 3,000 | 2013 | Fall |
| 3,000 | 2012 | Spring |
| 5,000 | 2011 | Spring |
| 4,000 | 2009 | Fall |
| 10,000 | 2009 | Spring |
| 8,000 | 2008 | Winter |
| 10,000 | 2007 | Winter |
| 3,000 | 2007 | Fall |
| 3,500 | 2006 | Winter |
| Point Pelee (ON006) | ||
|---|---|---|
| Number | Year | Season |
| 9,000 - 13,900 | 2015 | Fall |
| 6,000 - 7,500 | 2014 | Fall |
| 3,450 | 2010 | Fall |
| 3,500 | 2009 | Fall |
| 4,200 - 4,500 | 2008 | Fall |
| 3,040 - 8,060 | 2008 | Spring |
| 12,000 | 2007 | Fall |
| 4,000 - 12,000 | 2006 | Fall |
| 4,000 | 2006 | Spring |
| 4,000 | 2004 | Fall |
| 5,500 - 6,000 | 2002 | Spring |
| 4,000 | 1998 | Fall |
| 6,000 | 1996 | Fall |
| 7,000 | 1993 | Fall |
| 5,000 - 15,000 | 1992 | Fall |
| 4,000 | 1990 | Winter |
| Prince Edward County South Shore (ON003) | ||
|---|---|---|
| Number | Year | Season |
| 3,000 - 3,500 | 2021 | Spring |
| 4,500 - 5,000 | 2018 | Spring |
| 3,000 | 2017 | Spring |
| 3,150 - 10,000 | 2015 | Spring |
| 3,000 | 2014 | Spring |
| 3,000 - 15,000 | 2012 | Spring |
| 5,000 | 2011 | Spring |
| 3,000 - 5,000 | 2009 | Spring |
| 3,000 | 2006 | Spring |
| 3,000 - 5,000 | 2005 | Spring |
| 3,500 - 5,000 | 2004 | Spring |
| 3,000 | 2002 | Spring |
| 5,000 - 10,000 | 1996 | Spring |
| Little Qualicum Estuary to Nanoose Bay (BC056) | ||
|---|---|---|
| Number | Year | Season |
| 4,700 - 5,000 | 2020 | Winter |
| 4,500 - 6,200 | 2020 | Fall |
| 5,000 - 12,000 | 2019 | Fall |
| 7,500 - 12,500 | 2018 | Fall |
| 3,000 - 7,600 | 2017 | Fall |
| 4,500 - 7,250 | 2006 | Winter |
| 3,000 | 1985 | Winter |
| ? | ? | Other |
| Active Pass (BC015) | ||
|---|---|---|
| Number | Year | Season |
| 3,000 - 5,500 | 2019 | Spring |
| 3,500 - 5,114 | 2017 | Spring |
| 6,000 | 2013 | Spring |
| 3,000 - 5,000 | 2012 | Spring |
| 3,300 - 8,000 | 2010 | Spring |
| 4,000 | 2009 | Spring |
| 4,000 | 2008 | Fall |
| 6,795 | 2008 | Spring |
| 7,000 | 2004 | Fall |
| 3,150 | 2003 | Spring |
| 7,000 | 1998 | Spring |
| 5,000 | 1997 | Spring |
| 10,000 | 1995 | Fall |
| 4,000 | 1995 | Spring |
| 6,500 | 1994 | Spring |
| 7,000 | 1992 | Spring |
| 7,500 | 1987 | Spring |
| 7,000 | 1976 | Fall |
| Amherst Island (ON062) | ||
|---|---|---|
| Number | Year | Season |
| 3,000 - 6,000 | 2021 | Spring |
| 3,500 | 2018 | Spring |
| 8,000 | 2016 | Spring |
| Baie Comeau (QC082) | ||
|---|---|---|
| Number | Year | Season |
| 3,200 | 2021 | Fall |
| 3,000 | 2019 | Fall |
| 4,000 | 2016 | Fall |
| 3,500 | 2015 | Fall |
| 3,100 - 4,000 | 2013 | Fall |
| 3,700 - 6,800 | 2012 | Fall |
| 3,000 | 2010 | Fall |
| 3,000 | 2003 | Fall |
| 4,000 | 1998 | Fall |
| 4,000 - 5,000 | 1996 | Fall |
| 3,000 - 6,000 | 1994 | Fall |
| 4,000 - 5,000 | 1993 | Fall |
| 2,200 - 8,000 | 1992 | Fall |
| 2,000 - 5,000 | 1991 | Fall |
| 2,500 | 1985 | Fall |
| 2,000 - 6,500 | 1984 | Fall |
| ? | ? | Fall |
| Tadoussac (QC085) | ||
|---|---|---|
| Number | Year | Season |
| 4,100 - 4,600 | 2021 | Fall |
| 3,000 - 3,700 | 2020 | Fall |
| 3,050 - 4,700 | 2019 | Fall |
| 4,500 - 7,500 | 2018 | Fall |
| 3,000 - 5,400 | 2017 | Fall |
| 5,850 - 6,700 | 2016 | Fall |
| 4,750 | 2016 | Summer |
| 3,850 | 2016 | Spring |
| 6,000 - 7,200 | 2015 | Fall |
| 3,000 - 4,600 | 2014 | Fall |
| 3,000 - 6,713 | 2013 | Fall |
| 3,200 - 4,400 | 2012 | Fall |
| 3,000 - 5,000 | 2011 | Fall |
| 3,000 | 2009 | Fall |
| 3,500 | 2005 | Fall |
| 3,500 - 4,000 | 2004 | Fall |
| 3,000 | 2003 | Fall |
| 3,000 - 5,000 | 2002 | Fall |
| 3,000 - 4,000 | 2000 | Fall |
| 3,000 - 4,000 | 1997 | Fall |
| 2,000 | 1993 | Fall |
| ? | ? | Fall |
| Delta Marsh (MB001) | ||
|---|---|---|
| Number | Year | Season |
| 6,710 | 2018 | Fall |
| Baie des Escoumins et Grandes-Bergeronnes (QC084) | ||
|---|---|---|
| Number | Year | Season |
| 4,000 - 5,000 | 2021 | Fall |
| 3,000 | 2020 | Fall |
| 3,200 | 2020 | Summer |
| 3,150 - 5,500 | 2019 | Fall |
| 3,000 - 5,200 | 2018 | Fall |
| 3,000 | 2016 | Fall |
| 3,000 | 2015 | Fall |
| 3,000 - 6,000 | 2014 | Fall |
| 6,000 | 2013 | Fall |
| 3,000 | 1999 | Fall |
| 2,000 | 1994 | Fall |
| Grand Manan Archipelago (NB011) | ||
|---|---|---|
| Number | Year | Season |
| 6,000 | 1998 | Winter |
| Boundary Bay - Roberts Bank - Sturgeon Bank (Fraser River Estuary) (BC017) | ||
|---|---|---|
| Number | Year | Season |
| 4,000 - 5,500 | 2013 | Spring |
| Presqu'ile Provincial Park (ON004) | ||
|---|---|---|
| Number | Year | Season |
| 3,000 | 2016 | Spring |
| 5,000 | 2008 | Fall |
| 3,000 | 1999 | Fall |
| Pelee Island Natural Areas (ON013) | ||
|---|---|---|
| Number | Year | Season |
| 3,000 - 4,000 | 2014 | Spring |
| Eastern Lake St. Clair (ON012) | ||
|---|---|---|
| Number | Year | Season |
| 3,500 | 2020 | Spring |
| 3,729 | 2003 | Winter |
| 3,356 | 1996 | Winter |
| 3,849 | 1994 | Winter |
| White Islets and Wilson Creek (BC025) | ||
|---|---|---|
| Number | Year | Season |
| 3,500 | 2018 | Fall |
| Grande Prairie - Trumpeter Swan IBA (AB107) | ||
|---|---|---|
| Number | Year | Season |
| 3,370 | 2008 | Spring |
| Machias Seal Island (NB019) | ||
|---|---|---|
| Number | Year | Season |
| 3,000 | 2007 | Winter |
| Netley-Libau Marsh (MB009) | ||
|---|---|---|
| Number | Year | Season |
| 3,000 | 1990 | Fall |