Least Bittern
Scientific Name: Ixobrychus exilis
Thresholds:
- Eastern Lake St. Clair (ON012)75 (max.)
- Matchedash Bay (ON035)32 (max.)
- Plaisance (QC139)30 (max.)
- Nicolet et Baie-du-Fèbvre (QC112)28 (max.)
- Long Point Peninsula and Marshes (ON001)22 (max.)
- Luther Marsh (ON059)20 (max.)
- Marais de Saint-Timothée (QC158)20 (max.)
- Lac Saint-Louis et Îles-de-la-Paix (QC134)19 (max.)
- Tiny Marsh (ON025)16 (max.)
- Marais de Saint-Étienne (QC160)12 (max.)
- Pittock Reservoir (ON027)12 (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.
Sub-regional/National SAR
The sub-regional/national SAR threshold = 1% of the COSEWIC population estimate for the region (provinces/territories) in which the species is listed as being at risk. This threshold is used to identify trigger species and IBAs under criterion C1.
| Eastern Lake St. Clair (ON012) | ||
|---|---|---|
| Number | Year | Season |
| 75 | 1998 | Summer |
| 13 | 1997 | Summer |
| Matchedash Bay (ON035) | ||
|---|---|---|
| Number | Year | Season |
| 32 | 2000 | Summer |
| 20 | 1999 | Summer |
| Plaisance (QC139) | ||
|---|---|---|
| Number | Year | Season |
| 30 | 1995 | Summer |
| Nicolet et Baie-du-Fèbvre (QC112) | ||
|---|---|---|
| Number | Year | Season |
| 21 - 28 | 2018 | Spring |
| 17 | 2017 | Summer |
| 13 | 2016 | Summer |
| 13 | 2011 | Summer |
| 13 | 2011 | Spring |
| 12 | 2004 | Summer |
| 4 | 1996 | Summer |
| Long Point Peninsula and Marshes (ON001) | ||
|---|---|---|
| Number | Year | Season |
| 22 | 1995 | Summer |
| Luther Marsh (ON059) | ||
|---|---|---|
| Number | Year | Season |
| 10 | 1995 | Summer |
| 20 | 1901 | Other |
| Marais de Saint-Timothée (QC158) | ||
|---|---|---|
| Number | Year | Season |
| 18 | 2010 | Summer |
| 20 | 2000 | Summer |
| Lac Saint-Louis et Îles-de-la-Paix (QC134) | ||
|---|---|---|
| Number | Year | Season |
| 12 - 19 | 2010 | Summer |
| Tiny Marsh (ON025) | ||
|---|---|---|
| Number | Year | Season |
| 16 | 1995 | Summer |
| Marais de Saint-Étienne (QC160) | ||
|---|---|---|
| Number | Year | Season |
| 12 | 2017 | Summer |
| 4 | 1992 | Summer |
| Pittock Reservoir (ON027) | ||
|---|---|---|
| Number | Year | Season |
| 12 | 1995 | Summer |