Genus

Masked Gulls and allies

Chroicocephalus

10 species in our catalog · found in 150 parks

Species in this group

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

Chroicocephalus ridibundus

90–100% · Very likely

Endemic

Chroicocephalus novaehollandiae

80–90% · Very likely

Chroicocephalus serranus

80–90% · Very likely

Chroicocephalus cirrocephalus

60–70% · Likely

Chroicocephalus hartlaubii

50–60% · Likely

Chroicocephalus philadelphia

50–60% · Likely

Endemic

Chroicocephalus bulleri

30–40% · Possible

Chroicocephalus maculipennis

20–30% · Possible

Chroicocephalus genei

10–20% · With luck

Chroicocephalus brunnicephalus

5–10% · With luck

See all 10 species Show fewer

📅 Monthly Probability

Probability-weighted average across the group's species

40–50

Jan

40–50

Feb

40–50

Mar

40–50

Apr

40–50

May

40–50

Jun

40–50

Jul

40–50

Aug

40–50

Sep

40–50

Oct

40–50

Nov

40–50

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

Masked Gulls and allies

Species in this group

Black-headed Gull

Silver Gull

Andean Gull

Grey-hooded Gull

Hartlaub's Gull

Bonaparte's Gull

Black-billed Gull

Brown-hooded Gull

Slender-billed Gull

Brown-headed Gull

📅 Monthly Probability

🕐 When They're Spotted

Where to see Masked Gulls and allies

Parks Ranked