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Black-headed Gull

Scientific Name: Chroicocephalus ridibundus

Wikipedia Page

Avibase

Dendroica

Cornell Lab of Ornithology

Thresholds:

GlobalInformation68,500
Regional/ContinentalInformation4

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.

Quidi Vidi Lake (NF022)
Number Year Season
4 - 102017Spring
42016Winter
25 - 382015Spring
40 - 702015Winter
15 - 652014Winter
40 - 452014Fall
40 - 452014Spring
20 - 902013Winter
10 - 902013Fall
8 - 192013Spring
12 - 752012Winter
35 - 1052012Fall
202012Spring
10 - 702011Winter
42011Summer
10 - 252011Spring
50 - 602010Winter
10 - 572008Winter
25 - 652006Spring
282006Winter
10 - 152005Winter
20 - 402005Fall
12 - 1002004Winter
42004Spring
252003Winter
852003Fall
30 - 451997Winter
901996Winter
65 - 751995Winter
5 - 101993Fall
4 - 91993Winter
5 - 361992Winter
4 - 231992Fall
15 - 441991Winter
14 - 531991Fall
151991Spring
35 - 791990Winter
25 - 731990Fall
4 - 281990Spring
Lagune du Havre aux Basques et plage de l'Ouest (QC003)
Number Year Season
6 - 172016Winter
4 - 152016Fall
5 - 122016Summer
42016Spring
12 - 222015Winter
7 - 152015Fall
7 - 452014Winter
4 - 502014Fall
42014Summer
42011Winter
302011Fall
62011Summer
4 - 402006Winter
42006Fall
92005Summer
202003Fall
42002Fall
42000Summer
221999Spring
4 - 51998Summer
121997Summer
4 - 81996Summer
5 - 101995Summer
51994Fall
8 - 301993Spring
41992Fall
10 - 181992Summer
9 - 151992Spring
5 - 121991Summer
61990Fall
South Shore - East Queens Co. Sector (NS024)
Number Year Season
302003Winter
82001Winter
42001Fall
501999Winter
41998Winter
Plages de La Martinique et de Havre-Aubert (QC005)
Number Year Season
72016Fall
452014Winter
112013Winter
62001Fall
Île de l'Est (QC009)
Number Year Season
4 - 92016Fall
4 - 142016Spring
252015Summer
52015Spring
5 - 202014Summer
14 - 372014Spring
82013Summer
202013Spring
42011Summer
5 - 182009Summer
9 - 302008Summer
4 - 342007Summer
252006Summer
182005Summer
142004Summer
122003Fall
152003Summer
192002Spring
92001Spring
122000Summer
South Shore (Port Joli sector) (NS004)
Number Year Season
132012Winter
72007Winter
72005Winter
122003Winter
322001Winter
161999Winter
251997Winter
91996Winter
101995Winter
71994Winter
La Pointe (QC013)
Number Year Season
6 - 312015Spring
Northern Head and South Head (NS053)
Number Year Season
42001Winter
61999Winter
8 - 311999Fall
41999Spring
41998Winter
81996Winter
Pomquet Beach Region (NS009)
Number Year Season
62013Fall
152009Fall
52007Fall
232006Fall
152000Winter
Quoddy Region (NB037)
Number Year Season
221995Winter
Gros Morne National Park (NF045)
Number Year Season
102012Winter
82011Winter
202011Summer
52009Winter
102008Summer
62001Winter
82000Winter
91998Winter
51991Winter
Witless Bay Islands (NF002)
Number Year Season
202012Summer
Bassin aux Huîtres (QC015)
Number Year Season
62016Spring
152014Spring
Big Glace Bay Lake (NS007)
Number Year Season
6 - 102000Winter
121999Fall
101999Winter
5 - 91998Fall
Bird Islands (NS001)
Number Year Season
102009Fall
PEI National Park (PE013)
Number Year Season
102009Fall
Plage de l'Hôpital (QC012)
Number Year Season
82014Summer
Terra Nova National Park (NF017)
Number Year Season
42002Winter
42000Winter
71996Winter
Cape Freels Coastline and Cabot Island (NF025)
Number Year Season
62011Fall
Grand Bay West to Cheeseman Prov. Pk. (NF038)
Number Year Season
62013Summer
Quaco Bay (NB033)
Number Year Season
62013Spring
Brier Island and Offshore Waters (NS021)
Number Year Season
52012Summer
Île aux Loups Marins (QC027)
Number Year Season
42017Spring
52016Spring
42015Summer
The Brothers (NS003)
Number Year Season
52013Winter
Cap Noir (QC016)
Number Year Season
41997Summer
Cape St. Mary's (NF001)
Number Year Season
41997Spring
The Cape Pine and St. Shotts Barren (NF015)
Number Year Season
42015Summer