Genus

Masked Gulls and allies

Chroicocephalus

10 species in our catalog · found in 157 parks

KingdomAnimalia (Animals)
PhylumChordata (Chordates)
ClassAves (Birds)
OrderCharadriiformes (Shorebirds and Allies)
FamilyLaridae (Gulls, Terns, and Skimmers)
GenusChroicocephalus (Masked Gulls and allies)

Species in this group

Each card shows the species at its best park — tap for the full profile

Chroicocephalus ridibundus

Daily sighting probability ~90% · Very likely

Chroicocephalus novaehollandiae

Daily sighting probability ~80% · Very likely

Chroicocephalus serranus

Daily sighting probability ~80% · Very likely

Chroicocephalus cirrocephalus

Daily sighting probability ~70% · Very likely

Chroicocephalus hartlaubii

Daily sighting probability ~60% · Likely

Chroicocephalus philadelphia

Daily sighting probability ~50% · Likely

Endemic

Chroicocephalus bulleri

Daily sighting probability ~40% · Likely

Chroicocephalus genei

Daily sighting probability ~20% · Possible

Chroicocephalus maculipennis

Daily sighting probability ~20% · Possible

Chroicocephalus brunnicephalus

Daily sighting probability ~10% · With luck

See all 10 species Show fewer

Daily sighting probability by month

Probability-weighted average across the group's species

~40%

Jan

~50%

Feb

~50%

Mar

~50%

Apr

~40%

May

~50%

Jun

~50%

Jul

~50%

Aug

~50%

Sep

~50%

Oct

~50%

Nov

~40%

Dec

When they're spotted

When the group's species are recorded (aggregated)

Where to see Masked Gulls and allies

Worldwide records of this group (human observations from 2019 onwards, GBIF). Pins mark our parks — tap one for the chance of seeing at least one species of the group there.

Parks Ranked

Chance of seeing at least one species of the group · number of its species present

#	Park	Country	Species	Daily sighting probability
1	Thingvellir National Park	🇮🇸 Iceland	1	~90%
	Black-headed Gull			~90%
2	Rakiura National Park	🇳🇿 New Zealand	2	~80%
	Silver Gull			~80%
	Black-billed Gull			<5%
3	Cajas National Park	🇪🇨 Ecuador	1	~80%
	Andean Gull			~80%
4	Camargue	🇫🇷 France	2	~80%
	Black-headed Gull			~70%
	Slender-billed Gull			~30%
5	Ningaloo Marine Park	🇦🇺 Australia	1	~80%
	Silver Gull			~80%
6	Wilsons Promontory National Park	🇦🇺 Australia	1	~80%
	Silver Gull			~80%
7	Vatnajokull National Park	🇮🇸 Iceland	2	~70%
	Black-headed Gull			~70%
	Bonaparte's Gull			Insufficient data
8	Freycinet National Park	🇦🇺 Australia	1	~70%
	Silver Gull			~70%
9	Fertő-Hanság National Park	🇭🇺 Hungary	1	~70%
	Black-headed Gull			~70%
10	Maria Island National Park	🇦🇺 Australia	1	~70%
	Silver Gull			~70%
11	Cape Range	🇦🇺 Australia	1	~70%
	Silver Gull			~70%
12	Hortobágy National Park	🇭🇺 Hungary	1	~70%
	Black-headed Gull			~70%
13	Paracas National Reserve	🇵🇪 Peru	2	~70%
	Grey-hooded Gull			~70%
	Andean Gull			~10%
14	Lake Nakuru National Park	🇰🇪 Kenya	3	~60%
	Grey-hooded Gull			~60%
	Black-headed Gull			~10%
	Slender-billed Gull			<5%
15	Wadden Sea National Park	🇩🇪 Germany	2	~60%
	Black-headed Gull			~60%
	Bonaparte's Gull			<5%
16	Namib-Naukluft National Park	🇳🇦 Namibia	2	~60%
	Hartlaub's Gull			~60%
	Grey-hooded Gull			~10%
17	Abel Tasman National Park	🇳🇿 New Zealand	2	~60%
	Silver Gull			~60%
	Black-billed Gull			~10%
18	Fiordland National Park	🇳🇿 New Zealand	2	~60%
	Black-billed Gull			~40%
	Silver Gull			~30%
19	Point Pelee National Park	🇨🇦 Canada	2	~60%
	Bonaparte's Gull			~50%
	Black-headed Gull			Insufficient data
20	Biebrza National Park	🇵🇱 Poland	1	~50%
	Black-headed Gull			~50%
21	Kiskunság National Park	🇭🇺 Hungary	1	~50%
	Black-headed Gull			~50%
22	Booderee National Park	🇦🇺 Australia	1	~50%
	Silver Gull			~50%
23	Lauca National Park	🇨🇱 Chile	1	~40%
	Andean Gull			~40%
24	Flinders Chase	🇦🇺 Australia	1	~40%
	Silver Gull			~40%
25	Great Otway National Park	🇦🇺 Australia	1	~40%
	Silver Gull			~40%
26	Noosa National Park	🇦🇺 Australia	1	~40%
	Silver Gull			~40%
27	Snowdonia National Park	🇬🇧 United Kingdom	1	~40%
	Black-headed Gull			~40%
28	Table Mountain National Park	🇿🇦 South Africa	3	~40%
	Hartlaub's Gull			~30%
	Grey-hooded Gull			<5%
	Black-headed Gull			Insufficient data
29	iSimangaliso Wetland Park	🇿🇦 South Africa	2	~40%
	Grey-hooded Gull			~40%
	Hartlaub's Gull			<5%
30	Doñana National Park	🇪🇸 Spain	2	~40%
	Black-headed Gull			~20%
	Slender-billed Gull			~20%
31	Cairngorms National Park	🇬🇧 United Kingdom	1	~40%
	Black-headed Gull			~40%
32	Białowieża National Park	🇵🇱 Poland	1	~30%
	Black-headed Gull			~30%
33	Huascarán National Park	🇵🇪 Peru	1	~20%
	Andean Gull			~20%
34	Sierra de Guadarrama National Park	🇪🇸 Spain	1	~20%
	Black-headed Gull			~20%
35	Bavarian Forest National Park	🇩🇪 Germany	1	~20%
	Black-headed Gull			~20%
36	Liwonde National Park	🇲🇼 Malawi	1	~20%
	Grey-hooded Gull			~20%
37	Península Valdés	🇦🇷 Argentina	1	~20%
	Brown-hooded Gull			~20%
38	Katmai National Park	🇺🇸 United States	1	~20%
	Bonaparte's Gull			~20%
39	Ngorongoro Conservation Area	🇹🇿 Tanzania	3	~20%
	Grey-hooded Gull			~20%
	Slender-billed Gull			Insufficient data
	Black-headed Gull			<5%
40	Torres del Paine National Park	🇨🇱 Chile	1	~20%
	Brown-hooded Gull			~20%
41	Royal National Park	🇦🇺 Australia	1	~20%
	Silver Gull			~20%
42	Queen Elizabeth National Park	🇺🇬 Uganda	3	~20%
	Grey-hooded Gull			~20%
	Black-headed Gull			Insufficient data
	Slender-billed Gull			Insufficient data
43	Elk Island National Park	🇨🇦 Canada	1	~20%
	Bonaparte's Gull			~20%
44	Chobe National Park	🇧🇼 Botswana	1	~20%
	Grey-hooded Gull			~20%
45	Great Bear Rainforest	🇨🇦 Canada	1	~20%
	Bonaparte's Gull			~20%
46	El Vizcaíno Biosphere Reserve	🇲🇽 Mexico	1	~20%
	Bonaparte's Gull			~20%
47	Nahuel Huapi National Park	🇦🇷 Argentina	2	~10%
	Brown-hooded Gull			~10%
	Andean Gull			Insufficient data
48	Wood Buffalo National Park	🇨🇦 Canada	1	~10%
	Bonaparte's Gull			~10%
49	Daintree National Park	🇦🇺 Australia	1	~10%
	Silver Gull			~10%
50	Channel Islands National Park	🇺🇸 United States	2	~10%
	Bonaparte's Gull			~10%
	Black-headed Gull			Insufficient data
51	Sundarbans National Park	🇮🇳 India	2	~10%
	Brown-headed Gull			~10%
	Black-headed Gull			<5%
52	Tongariro National Park	🇳🇿 New Zealand	2	~10%
	Black-billed Gull			~10%
	Silver Gull			<5%
53	Grampians National Park	🇦🇺 Australia	1	~10%
	Silver Gull			~10%
54	Kosciuszko National Park	🇦🇺 Australia	1	~10%
	Silver Gull			~10%
55	Murchison Falls National Park	🇺🇬 Uganda	3	~10%
	Grey-hooded Gull			~10%
	Black-headed Gull			<5%
	Slender-billed Gull			<5%
56	Monfragüe National Park	🇪🇸 Spain	1	~10%
	Black-headed Gull			~10%
57	Gauja National Park	🇱🇻 Latvia	1	~10%
	Black-headed Gull			~10%
58	Main Ridge Forest Reserve	🇹🇹 Trinidad and Tobago	1	~10%
	Black-headed Gull			Insufficient data
59	Garden Route National Park	🇿🇦 South Africa	2	~10%
	Grey-hooded Gull			~10%
	Hartlaub's Gull			<5%
60	Vicente Pérez Rosales National Park	🇨🇱 Chile	1	~10%
	Brown-hooded Gull			~10%
61	Aoraki Mount Cook National Park	🇳🇿 New Zealand	2	~10%
	Black-billed Gull			~10%
	Silver Gull			Insufficient data
62	Nahanni National Park	🇨🇦 Canada	1	~10%
	Bonaparte's Gull			Insufficient data
63	Kluane National Park	🇨🇦 Canada	1	~10%
	Bonaparte's Gull			~10%
64	Kafue National Park	🇿🇲 Zambia	1	~10%
	Grey-hooded Gull			~10%
65	Kenai Fjords National Park	🇺🇸 United States	1	~10%
	Bonaparte's Gull			~10%
66	Tierra del Fuego National Park	🇦🇷 Argentina	1	~10%
	Brown-hooded Gull			~10%
67	Cabo Pulmo National Park	🇲🇽 Mexico	1	~10%
	Bonaparte's Gull			~10%
68	Celestún Biosphere Reserve	🇲🇽 Mexico	1	~10%
	Bonaparte's Gull			~10%
69	Virunga National Park	🇨🇩 Democratic Republic of the Congo	3	~10%
	Grey-hooded Gull			~10%
	Slender-billed Gull			Insufficient data
	Black-headed Gull			Insufficient data
70	Riding Mountain National Park	🇨🇦 Canada	1	~10%
	Bonaparte's Gull			~10%
71	Acadia National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
72	Lake Manyara National Park	🇹🇿 Tanzania	1	<5%
	Grey-hooded Gull			<5%
73	Wrangell-St. Elias National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
74	Mercantour National Park	🇫🇷 France	1	<5%
	Black-headed Gull			Insufficient data
75	Addo Elephant National Park	🇿🇦 South Africa	2	<5%
	Grey-hooded Gull			<5%
	Hartlaub's Gull			<5%
76	Serengeti National Park	🇹🇿 Tanzania	3	<5%
	Slender-billed Gull			Insufficient data
	Grey-hooded Gull			<5%
	Black-headed Gull			Insufficient data
77	Death Valley National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
78	Egmont National Park	🇳🇿 New Zealand	1	<5%
	Silver Gull			Insufficient data
79	Pilanesberg National Park	🇿🇦 South Africa	1	<5%
	Grey-hooded Gull			<5%
80	Pacific Rim National Park Reserve	🇨🇦 Canada	1	<5%
	Bonaparte's Gull			<5%
81	Olympic National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
82	Kaeng Krachan National Park	🇹🇭 Thailand	1	<5%
	Brown-headed Gull			Insufficient data
83	Madidi National Park	🇧🇴 Bolivia	1	<5%
	Andean Gull			<5%
84	Tatra National Park	🇸🇰 Slovakia	1	<5%
	Black-headed Gull			<5%
85	Mana Pools National Park	🇿🇼 Zimbabwe	1	<5%
	Grey-hooded Gull			<5%
86	Keoladeo National Park	🇮🇳 India	2	<5%
	Black-headed Gull			<5%
	Brown-headed Gull			<5%
87	Redwood National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
88	Gonarezhou National Park	🇿🇼 Zimbabwe	1	<5%
	Grey-hooded Gull			Insufficient data
89	Arthur's Pass National Park	🇳🇿 New Zealand	2	<5%
	Black-billed Gull			<5%
	Silver Gull			Insufficient data
90	Bahía de Loreto National Park	🇲🇽 Mexico	1	<5%
	Bonaparte's Gull			<5%
91	Cape Breton Highlands National Park	🇨🇦 Canada	2	<5%
	Bonaparte's Gull			<5%
	Black-headed Gull			Insufficient data
92	Kaziranga National Park	🇮🇳 India	2	<5%
	Brown-headed Gull			<5%
	Black-headed Gull			<5%
93	Lower Zambezi National Park	🇿🇲 Zambia	1	<5%
	Grey-hooded Gull			Insufficient data
94	Isla del Coco National Park	🇨🇷 Costa Rica	1	<5%
	Bonaparte's Gull			Insufficient data
95	Plitvice Lakes National Park	🇭🇷 Croatia	1	<5%
	Black-headed Gull			Insufficient data
96	Amboseli National Park	🇰🇪 Kenya	1	<5%
	Grey-hooded Gull			<5%
97	Triglav National Park	🇸🇮 Slovenia	1	<5%
	Black-headed Gull			<5%
98	Arusha National Park	🇹🇿 Tanzania	1	<5%
	Grey-hooded Gull			<5%
99	Machalilla National Park	🇪🇨 Ecuador	1	<5%
	Grey-hooded Gull			<5%
100	Everglades National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
101	Satpura National Park	🇮🇳 India	2	<5%
	Black-headed Gull			<5%
	Brown-headed Gull			<5%
102	Ranthambore National Park	🇮🇳 India	2	<5%
	Brown-headed Gull			<5%
	Black-headed Gull			Insufficient data
103	Bandipur National Park	🇮🇳 India	1	<5%
	Brown-headed Gull			Insufficient data
104	Cévennes National Park	🇫🇷 France	1	<5%
	Black-headed Gull			Insufficient data
105	Jasper National Park	🇨🇦 Canada	1	<5%
	Bonaparte's Gull			<5%
106	Gobi Gurvansaikhan National Park	🇲🇳 Mongolia	1	<5%
	Black-headed Gull			<5%
107	Pyrénées National Park	🇫🇷 France	1	<5%
	Black-headed Gull			<5%
108	Nairobi National Park	🇰🇪 Kenya	2	<5%
	Grey-hooded Gull			<5%
	Black-headed Gull			Insufficient data
109	Banff National Park	🇨🇦 Canada	1	<5%
	Bonaparte's Gull			<5%
110	Tarangire National Park	🇹🇿 Tanzania	1	<5%
	Grey-hooded Gull			<5%
111	Tsavo West National Park	🇰🇪 Kenya	1	<5%
	Grey-hooded Gull			<5%
112	Moremi Game Reserve	🇧🇼 Botswana	1	<5%
	Grey-hooded Gull			<5%
113	Shenandoah National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
114	Chitwan National Park	🇳🇵 Nepal	1	<5%
	Black-headed Gull			<5%
115	Gorongosa National Park	🇲🇿 Mozambique	1	<5%
	Grey-hooded Gull			Insufficient data
116	Wilpattu National Park	🇱🇰 Sri Lanka	1	<5%
	Brown-headed Gull			Insufficient data
117	Kruger National Park	🇿🇦 South Africa	1	<5%
	Grey-hooded Gull			<5%
118	Springbrook National Park	🇦🇺 Australia	1	<5%
	Silver Gull			Insufficient data
119	Cradle Mountain-Lake St Clair National Park	🇦🇺 Australia	1	<5%
	Silver Gull			Insufficient data
120	Etosha National Park	🇳🇦 Namibia	1	<5%
	Grey-hooded Gull			<5%
121	Yala National Park	🇱🇰 Sri Lanka	1	<5%
	Brown-headed Gull			Insufficient data
122	Ciénaga de Zapata	🇨🇺 Cuba	1	<5%
	Bonaparte's Gull			<5%
123	Jim Corbett National Park	🇮🇳 India	2	<5%
	Black-headed Gull			Insufficient data
	Brown-headed Gull			Insufficient data
124	Voyageurs National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			Insufficient data
125	Ruaha National Park	🇹🇿 Tanzania	1	<5%
	Grey-hooded Gull			Insufficient data
126	Isle Royale National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			Insufficient data
127	Iberá National Park	🇦🇷 Argentina	1	<5%
	Grey-hooded Gull			<5%
128	Amboró National Park	🇧🇴 Bolivia	1	<5%
	Andean Gull			Insufficient data
129	Kakadu National Park	🇦🇺 Australia	1	<5%
	Silver Gull			Insufficient data
130	Blue Mountains National Park	🇦🇺 Australia	1	<5%
	Silver Gull			<5%
131	Bandhavgarh National Park	🇮🇳 India	2	<5%
	Brown-headed Gull			Insufficient data
	Black-headed Gull			Insufficient data
132	Glacier National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
133	Ría Lagartos Biosphere Reserve	🇲🇽 Mexico	1	<5%
	Bonaparte's Gull			Insufficient data
134	Aberdare National Park	🇰🇪 Kenya	1	<5%
	Grey-hooded Gull			Insufficient data
135	Akagera National Park	🇷🇼 Rwanda	1	<5%
	Grey-hooded Gull			Insufficient data
136	Manas National Park	🇮🇳 India	2	<5%
	Brown-headed Gull			Insufficient data
	Black-headed Gull			Insufficient data
137	Hwange National Park	🇿🇼 Zimbabwe	1	<5%
	Grey-hooded Gull			Insufficient data
138	Raja Ampat	🇮🇩 Indonesia	1	<5%
	Black-headed Gull			Insufficient data
139	Tijuca National Park	🇧🇷 Brazil	1	<5%
	Grey-hooded Gull			Insufficient data
140	Nagarhole National Park	🇮🇳 India	1	<5%
	Brown-headed Gull			Insufficient data
141	South Luangwa National Park	🇿🇲 Zambia	1	<5%
	Grey-hooded Gull			Insufficient data
142	Sierra Nevada National Park	🇪🇸 Spain	1	<5%
	Black-headed Gull			Insufficient data
143	Gros Morne National Park	🇨🇦 Canada	1	<5%
	Black-headed Gull			Insufficient data
144	Rocky Mountain National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
145	Sequoia and Kings Canyon National Parks	🇺🇸 United States	1	<5%
	Bonaparte's Gull			Insufficient data
146	Big Cypress National Preserve	🇺🇸 United States	1	<5%
	Bonaparte's Gull			Insufficient data
147	Lake Mburo National Park	🇺🇬 Uganda	1	<5%
	Grey-hooded Gull			Insufficient data
148	Yellowstone National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			Insufficient data
149	Cordillera Azul National Park	🇵🇪 Peru	1	<5%
	Andean Gull			Insufficient data
150	Las Baulas Marine National Park	🇨🇷 Costa Rica	1	<5%
	Bonaparte's Gull			Insufficient data
151	Saguaro National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			<5%
152	Podocarpus National Park	🇪🇨 Ecuador	1	<5%
	Andean Gull			Insufficient data
153	Tsavo East National Park	🇰🇪 Kenya	1	<5%
	Black-headed Gull			Insufficient data
154	Badlands National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			Insufficient data
155	Kibale National Park	🇺🇬 Uganda	1	<5%
	Grey-hooded Gull			Insufficient data
156	Grand Teton National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			Insufficient data
157	Great Smoky Mountains National Park	🇺🇸 United States	1	<5%
	Bonaparte's Gull			Insufficient data