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Roseate Tern

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Roseate Tern

Scientific Name: Sterna dougallii

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Avibase

Dendroica

Cornell Lab of Ornithology

Thresholds:

GlobalInformation760
Regional/ContinentalInformation120
Sub-regional/National SARInformation2

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.

The Brothers (NS003)
Number Year Season
4 - 52018Summer
62018Spring
2 - 322017Summer
4 - 72016Summer
8 - 92016Spring
2 - 172015Summer
2 - 82015Spring
2 - 122014Summer
72013Summer
152012Summer
42010Summer
102007Summer
1722000Summer
1221999Summer
1181998Summer
2 - 1081997Summer
961996Summer
661995Summer
681994Winter
601993Summer
461992Summer
401991Summer
Country Island Complex (NS028)
Number Year Season
4 - 82018Summer
32010Summer
1082000Summer
321999Summer
61998Summer
21997Summer
901996Summer
601993Summer
Grassy Island Complex (NS026)
Number Year Season
22011Summer
101998Summer
241997Summer
601995Summer
401993Summer
121985Summer
901970Summer
South Shore (Barrington Bay Sector) (NS018)
Number Year Season
432000Summer
Sable Island, Nova Scotia (NS025)
Number Year Season
22018Summer
3 - 62017Summer
22017Spring
152009Other
102008Other
42007Other
11998Summer
21997Summer
61994Summer
81993Summer
201985Summer
301980Summer
Eastern Cape Sable Island (NS016)
Number Year Season
22018Summer
32018Spring
2 - 82017Fall
5 - 142017Summer
22016Fall
2 - 32016Summer
22013Summer
21997Summer
Île Paquet (QC022)
Number Year Season
2 - 42000Summer
2 - 41999Summer
21998Summer
2 - 31996Summer
21996Spring
1 - 21995Summer
11995Spring
21993Summer
2 - 41993Spring
2 - 31992Summer
21992Spring
1 - 41991Summer
1 - 41991Spring
21990Fall
2 - 31990Summer
1 - 21989Fall
1 - 21989Summer
21989Spring
1 - 71988Fall
61988Summer
Machias Seal Island (NB019)
Number Year Season
2 - 51996Summer
41995Summer
21994Summer
South Shore (Port Joli sector) (NS004)
Number Year Season
2 - 52008Spring
La Pointe (QC013)
Number Year Season
22001Summer
22001Spring
21998Summer
2 - 31997Summer
2 - 31996Summer
21996Spring
21995Summer
21993Summer
2 - 41993Spring
2 - 31992Summer
21992Spring
41991Spring
21990Fall
2 - 31990Summer
Bassin aux Huîtres (QC015)
Number Year Season
21998Fall
2 - 31993Summer
21993Spring
21990Summer
Lagune du Havre aux Basques et plage de l'Ouest (QC003)
Number Year Season
21984Summer
21983Summer
2 - 31982Fall
21982Summer
11971Summer
Bon Portage Island (NS015)
Number Year Season
22015Summer
Îlot C (QC026)
Number Year Season
11995Spring
21994Summer
21990Winter
21990Summer