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Black-crowned Night Heron
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Black-crowned Night Heron
Scientific Name: Nycticorax nycticorax
Thresholds:
- Leslie Street Spit (ON038)2,390 (max.)
- Pelee Island Archipelago (ON014)1,850 (max.)
- Pelee Island Natural Areas (ON013)1,800 (max.)
- Pointe aux Rats Musques Heronry (NB027)1,400 (max.)
- Beaverhill Lake (AB001)1,098 (max.)
- Île aux Hérons Migratory Bird Sanctuary (QC128)1,020 (max.)
- Brandypot Islands (QC050)900 (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.
| Leslie Street Spit (ON038) | ||
|---|---|---|
| Number | Year | Season |
| 2,000 | 2003 | Summer |
| 2,390 | 1996 | Summer |
| 1,224 | 1990 | Summer |
| Pelee Island Archipelago (ON014) | ||
|---|---|---|
| Number | Year | Season |
| 400 | 1997 | Summer |
| 1,850 | 1983 | Summer |
| 1,000 | 1980 | Summer |
| Pelee Island Natural Areas (ON013) | ||
|---|---|---|
| Number | Year | Season |
| 1,800 | 1971 | Summer |
| Pointe aux Rats Musques Heronry (NB027) | ||
|---|---|---|
| Number | Year | Season |
| 1,200 | 1997 | Summer |
| 500 | 1982 | Summer |
| 1,400 | 1980 | Summer |
| Beaverhill Lake (AB001) | ||
|---|---|---|
| Number | Year | Season |
| 1,098 | 1976 | Summer |
| Île aux Hérons Migratory Bird Sanctuary (QC128) | ||
|---|---|---|
| Number | Year | Season |
| 600 | 1996 | Summer |
| 1,020 | 1993 | Fall |
| 1,020 | 1993 | Summer |
| 694 | 1988 | Summer |
| Brandypot Islands (QC050) | ||
|---|---|---|
| Number | Year | Season |
| 900 | 1989 | Summer |