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Ross's Gull
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Ross's Gull
Scientific Name: Rhodostethia rosea
Thresholds:
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.
| East Bay/Native Bay (NU023) | ||
|---|---|---|
| Number | Year | Season |
| 36 - 56 | 2005 | Summer |
| Cheyne Islands (NU049) | ||
|---|---|---|
| Number | Year | Season |
| 12 - 20 | 1978 | Summer |
| 6 | 1976 | Summer |
| Churchill & Vicinity (MB003) | ||
|---|---|---|
| Number | Year | Season |
| 1 | 2008 | Summer |
| 1 | 2007 | Summer |
| 1 - 4 | 2005 | Summer |
| 1 | 2004 | Summer |
| 1 | 2003 | Summer |
| 1 - 2 | 2002 | Summer |
| 1 | 2001 | Summer |
| 1 - 4 | 2000 | Summer |
| 1 | 1999 | Summer |
| 1 - 2 | 1998 | Summer |
| 1 | 1997 | Summer |
| 1 - 2 | 1996 | Summer |
| 1 | 1995 | Summer |
| 1 - 7 | 1994 | Summer |
| 1 - 2 | 1993 | Summer |
| 1 | 1992 | Summer |
| 1 - 2 | 1991 | Summer |
| 1 - 3 | 1990 | Summer |
| Coats Island/Cape Pembroke (NU005) | ||
|---|---|---|
| Number | Year | Season |
| 1 | 2004 | Summer |
| Oak Hammock Marsh WMA (MB010) | ||
|---|---|---|
| Number | Year | Season |
| 1 | 1996 | Summer |
| Southwest Bylot (NU013) | ||
|---|---|---|
| Number | Year | Season |
| 1 | 1979 | Summer |