Common Tern
Scientific Name: Sterna hirundo
Thresholds:
- Long Point Peninsula and Marshes (ON001)28,145 (max.)
- Kouchibouguac NP Sand Islands (NB003)14,000 (max.)
- Gull and Sandhill Island (MB004)8,800 (max.)
- Greater Rondeau Area (ON007)8,000 (max.)
- Miscou Island (NB021)8,000 (max.)
- Point Pelee (ON006)8,000 (max.)
- Neguac Sandspit (NB015)7,854 (max.)
- Tabusintac Lagoon & River Estuary (NB002)7,400 (max.)
- Lake St. Martin Islands (MB083)6,800 (max.)
- Machias Seal Island (NB019)6,800 (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.
| Long Point Peninsula and Marshes (ON001) | ||
|---|---|---|
| Number | Year | Season |
| 6,000 - 10,501 | 2016 | Fall |
| 10,074 - 13,110 | 2013 | Fall |
| 6,054 - 6,785 | 2009 | Fall |
| 9,400 | 2006 | Fall |
| 6,500 - 28,145 | 2005 | Fall |
| 1,000 | 1997 | Spring |
| 2,000 | 1994 | Fall |
| 10,000 | 1991 | Fall |
| 6,000 | 1990 | Fall |
| Kouchibouguac NP Sand Islands (NB003) | ||
|---|---|---|
| Number | Year | Season |
| 6,000 | 2021 | Summer |
| 6,000 | 2019 | Summer |
| 8,000 - 10,000 | 2017 | Summer |
| 6,000 - 7,500 | 2016 | Summer |
| 8,500 | 2014 | Summer |
| 6,000 | 2013 | Summer |
| 6,000 | 2012 | Summer |
| 10,136 | 1999 | Summer |
| 9,520 | 1998 | Summer |
| 8,592 | 1996 | Summer |
| 8,210 | 1995 | Summer |
| 7,396 | 1994 | Summer |
| 8,600 - 12,800 | 1992 | Summer |
| 14,000 | 1991 | Summer |
| 10,852 | 1990 | Summer |
| 8,860 | 1989 | Summer |
| 12,310 | 1987 | Summer |
| 13,760 | 1984 | Summer |
| 13,780 | 1983 | Summer |
| 12,234 | 1981 | Summer |
| 3,048 | 1976 | Summer |
| 3,184 | 1975 | Summer |
| 3,602 | 1974 | Summer |
| 2,982 | 1971 | Summer |
| Gull and Sandhill Island (MB004) | ||
|---|---|---|
| Number | Year | Season |
| 640 | 2012 | Summer |
| 8,800 | 1997 | Summer |
| Greater Rondeau Area (ON007) | ||
|---|---|---|
| Number | Year | Season |
| 8,000 | 1998 | Fall |
| Miscou Island (NB021) | ||
|---|---|---|
| Number | Year | Season |
| 7,000 | 2020 | Summer |
| 8,000 | 2003 | Summer |
| Point Pelee (ON006) | ||
|---|---|---|
| Number | Year | Season |
| 6,000 | 2002 | Spring |
| 8,000 | 2000 | Spring |
| 1,400 | 1994 | Spring |
| Neguac Sandspit (NB015) | ||
|---|---|---|
| Number | Year | Season |
| 0 | 1998 | Summer |
| 0 | 1997 | Summer |
| 400 | 1996 | Summer |
| 10 | 1995 | Summer |
| 0 | 1994 | Summer |
| 7,854 | 1993 | Summer |
| 3,620 | 1989 | Summer |
| Tabusintac Lagoon & River Estuary (NB002) | ||
|---|---|---|
| Number | Year | Season |
| 6,000 | 2015 | Summer |
| 0 | 1997 | Summer |
| 5,000 | 1996 | Summer |
| 7,400 | 1992 | Summer |
| Lake St. Martin Islands (MB083) | ||
|---|---|---|
| Number | Year | Season |
| 6,800 | 1991 | Summer |
| 100 | 1986 | Summer |
| Machias Seal Island (NB019) | ||
|---|---|---|
| Number | Year | Season |
| 1,962 | 1998 | Summer |
| 1,216 | 1996 | Summer |
| 736 | 1994 | Summer |
| 3,800 | 1988 | Summer |
| 6,800 | 1947 | Summer |