Ivory Gull
Scientific Name: Pagophila eburnea
Thresholds:
- Inglefield Mountains (NU014)730 (max.)
- Sydkap Ice Field (NU055)600 (max.)
- Northwestern Brodeur Peninsula (NU065)560 (max.)
- Seymour Island (NU045)300 (max.)
- Eastern Devon Island Nunataks (NU057)91 (max.)
- Southwest Bylot (NU013)75 (max.)
- Quidi Vidi Lake (NF022)9 (max.)
- Cape Graham Moore (NU068)6 (max.)
- Cape Freels Coastline and Cabot Island (NF025)4 (max.)
- Cape Hay (NU004)3 (max.)
- Cape Vera (NU053)2 (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.
Regional SAR
This threshold is static and standardized: Passeriformes (e.g. perching/songbirds) = 90 individuals (or 30 pairs); non-Passeriformes = 30 individuals (or 10 pairs). Only species listed by the IUCN as Vulnerable are presently eligible.
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.
| Inglefield Mountains (NU014) | ||
|---|---|---|
| Number | Year | Season |
| 730 | 1982 | Summer |
| Sydkap Ice Field (NU055) | ||
|---|---|---|
| Number | Year | Season |
| 600 | 1976 | Summer |
| Northwestern Brodeur Peninsula (NU065) | ||
|---|---|---|
| Number | Year | Season |
| 560 | 1982 | Summer |
| Seymour Island (NU045) | ||
|---|---|---|
| Number | Year | Season |
| 300 | 1976 | Summer |
| Eastern Devon Island Nunataks (NU057) | ||
|---|---|---|
| Number | Year | Season |
| 91 | 1982 | Summer |
| Southwest Bylot (NU013) | ||
|---|---|---|
| Number | Year | Season |
| 19 | 2013 | Fall |
| 75 | 1994 | Summer |
| Quidi Vidi Lake (NF022) | ||
|---|---|---|
| Number | Year | Season |
| 2 - 5 | 2002 | Winter |
| 4 - 9 | 1998 | Winter |
| 5 | 1997 | Spring |
| Cape Graham Moore (NU068) | ||
|---|---|---|
| Number | Year | Season |
| 4 | 2015 | Summer |
| 2 - 6 | 2014 | Fall |
| 3 | 2013 | Fall |
| Cape Freels Coastline and Cabot Island (NF025) | ||
|---|---|---|
| Number | Year | Season |
| 2 - 4 | 2013 | Spring |
| Cape Hay (NU004) | ||
|---|---|---|
| Number | Year | Season |
| 3 | 2013 | Fall |
| Cape Vera (NU053) | ||
|---|---|---|
| Number | Year | Season |
| 2 | 2003 | Summer |