Boidae (Boas) — Wallace's Line

Species in this group

LC

Corallus ruschenbergerii

Daily sighting probability ~80% · Very likely

LC

Eunectes murinus

Daily sighting probability ~60% · Likely

LC

Eunectes notaeus

Daily sighting probability ~60% · Likely

LC

Corallus hortulana

Daily sighting probability ~60% · Likely

Endemic

Sanzinia volontany

Daily sighting probability ~50% · Likely

LC

Acrantophis dumerili

Daily sighting probability ~50% · Likely

LC Endemic

Acrantophis madagascariensis

Daily sighting probability ~50% · Likely

LC Endemic

Sanzinia madagascariensis

Daily sighting probability ~50% · Likely

LC

Boa constrictor

Daily sighting probability ~40% · Likely

LC

Corallus annulatus

Daily sighting probability ~40% · Likely

LC

Boa imperator

Daily sighting probability ~40% · Likely

LC

Corallus caninus

Daily sighting probability ~30% · Possible

LC

Corallus batesii

Daily sighting probability ~30% · Possible

LC

Charina bottae

Daily sighting probability ~20% · Possible

LC

Epicrates cenchria

Daily sighting probability ~20% · Possible

LC

Candoia aspera

Daily sighting probability ~20% · Possible

LC

Epicrates crassus

Daily sighting probability ~20% · Possible

LC

Lichanura orcutti

Daily sighting probability ~20% · Possible

LC

Candoia carinata

Daily sighting probability ~20% · Possible

LC

Lichanura trivirgata

Daily sighting probability ~10% · With luck

LC

Ungaliophis panamensis

Daily sighting probability ~10% · With luck

See all 21 species Show fewer

Daily sighting probability by month

Probability-weighted average across the group's species

~30%

Jan

~30%

Feb

~30%

Mar

~30%

Apr

~30%

May

~30%

Jun

~30%

Jul

~30%

Aug

~30%

Sep

~30%

Oct

~30%

Nov

~30%

Dec

When they're spotted

When the group's species are recorded (aggregated)

Where to see Boas

Warmer areas are where this group is recorded most often. Shaded: the known ranges of its 39 species, darker where more of them overlap (GARD, Roll et al. 2017 & Caetano et al. 2022). Our parks Our cities In captivity: 433 zoos & centres

Parks Ranked

#	Park	Country	Species	Daily sighting probability
1	Cuyabeno Wildlife Reserve	🇪🇨 Ecuador	4 of 21	~90%
	Anaconda			~60%
	Garden Tree Boa			~60%
	Western Rainbow Boa			~20%
	Boa Constrictor			~20%
2	Caroni Swamp	🇹🇹 Trinidad and Tobago	1 of 21	~80%
	Dormilona			~80%
3	Ankarafantsika National Park	🇲🇬 Madagascar	2 of 21	~80%
	Nosy Komba ground boa			~50%
	Madagascar Ground Boa			~50%
4	Tambopata National Reserve	🇵🇪 Peru	5 of 21	~70%
	Garden Tree Boa			~40%
	Western Rainbow Boa			~20%
	Bates's Tree Boa			~20%
	Boa Constrictor			~10%
	Anaconda			~10%
5	Yasuní National Park	🇪🇨 Ecuador	4 of 21	~70%
	Anaconda			~30%
	Western Rainbow Boa			~20%
	Garden Tree Boa			~20%
	Boa Constrictor			~20%
6	Parque Estadual Encontro das Águas	🇧🇷 Brazil	1 of 21	~60%
	Yellow Anaconda			~60%
7	Manu National Park	🇵🇪 Peru	3 of 21	~60%
	Bates's Tree Boa			~30%
	Garden Tree Boa			~30%
	Western Rainbow Boa			~20%
8	Main Ridge Forest Reserve	🇹🇹 Trinidad and Tobago	2 of 21	~60%
	Boa Constrictor			~40%
	Dormilona			~40%
9	Emas National Park	🇧🇷 Brazil	2 of 21	~50%
	Boa Constrictor			~40%
	Eastern Rainbow Boa			~20%
10	Berenty Reserve	🇲🇬 Madagascar	1 of 21	~50%
	Dumeril's Boa			~50%
11	Ranomafana National Park	🇲🇬 Madagascar	1 of 21	~50%
	Madagascar tree boa			~50%
12	Mantadia National Park	🇲🇬 Madagascar	1 of 21	~50%
	Madagascar tree boa			~50%
13	Braulio Carrillo National Park	🇨🇷 Costa Rica	2 of 21	~50%
	Ringed Tree Boa			~40%
	Central American Boa			~10%
14	Piedras Blancas National Park	🇨🇷 Costa Rica	2 of 21	~40%
	Central American Boa			~30%
	Dormilona			~20%
15	Anavilhanas National Park	🇧🇷 Brazil	1 of 21	~40%
	Garden Tree Boa			~40%
16	Bastimentos Island National Marine Park	🇵🇦 Panama	1 of 21	~40%
	Central American Boa			~40%
17	Santa Rosa National Park	🇨🇷 Costa Rica	1 of 21	~30%
	Central American Boa			~30%
18	Raja Ampat	🇮🇩 Indonesia	2 of 21	~30%
	New Guinea ground boa			~20%
	Pacific Boa			~20%
19	Corcovado National Park	🇨🇷 Costa Rica	1 of 21	~30%
	Central American Boa			~30%
20	Palo Verde National Park	🇨🇷 Costa Rica	1 of 21	~30%
	Central American Boa			~30%
21	Iberá National Park	🇦🇷 Argentina	1 of 21	~30%
	Yellow Anaconda			~30%
22	Brownsberg Nature Park	🇸🇷 Suriname	1 of 21	~30%
	Emerald Tree Boa			~30%
23	Cabo Blanco Absolute Nature Reserve	🇨🇷 Costa Rica	1 of 21	~30%
	Central American Boa			~30%
24	Manuel Antonio National Park	🇨🇷 Costa Rica	3 of 21	~30%
	Central American Boa			~20%
	Dormilona			~10%
	Panamanian Dwarf Boa			~10%
25	Tortuguero National Park	🇨🇷 Costa Rica	1 of 21	~30%
	Central American Boa			~30%
26	Soberanía National Park	🇵🇦 Panama	2 of 21	~30%
	Central American Boa			~20%
	Ringed Tree Boa			~10%
27	Chapada Diamantina National Park	🇧🇷 Brazil	1 of 21	~30%
	Boa Constrictor			~30%
28	Gandoca-Manzanillo Wildlife Refuge	🇨🇷 Costa Rica	1 of 21	~30%
	Central American Boa			~30%
29	Sian Ka'an Biosphere Reserve	🇲🇽 Mexico	1 of 21	~30%
	Central American Boa			~30%
30	Ostional Wildlife Refuge	🇨🇷 Costa Rica	1 of 21	~30%
	Central American Boa			~30%
31	Tayrona National Natural Park	🇨🇴 Colombia	1 of 21	~30%
	Dormilona			~30%
32	Rincón de la Vieja National Park	🇨🇷 Costa Rica	1 of 21	~30%
	Central American Boa			~30%
33	Sequoia and Kings Canyon National Parks	🇺🇸 United States	1 of 21	~20%
	Northern Rubber Boa			~20%
34	Cahuita National Park	🇨🇷 Costa Rica	2 of 21	~20%
	Central American Boa			~20%
	Panamanian Dwarf Boa			~10%
35	Masaya Volcano National Park	🇳🇮 Nicaragua	1 of 21	~20%
	Central American Boa			~20%
36	Tenorio Volcano National Park	🇨🇷 Costa Rica	1 of 21	~20%
	Central American Boa			~20%
37	Tikal National Park	🇬🇹 Guatemala	1 of 21	~20%
	Central American Boa			~20%
38	Monteverde Cloud Forest Reserve	🇨🇷 Costa Rica	1 of 21	~20%
	Central American Boa			~20%
39	Joshua Tree National Park	🇺🇸 United States	1 of 21	~20%
	Northern Three-lined Boa			~20%
40	Lago de Yojoa	🇭🇳 Honduras	1 of 21	~20%
	Central American Boa			~20%
41	Tijuca National Park	🇧🇷 Brazil	1 of 21	~20%
	Boa Constrictor			~20%
42	Celestún Biosphere Reserve	🇲🇽 Mexico	1 of 21	~20%
	Central American Boa			~20%
43	Arenal Volcano National Park	🇨🇷 Costa Rica	2 of 21	~20%
	Central American Boa			~10%
	Ringed Tree Boa			~10%
44	Cerro Azul Meámbar National Park	🇭🇳 Honduras	1 of 21	~20%
	Central American Boa			~20%
45	Ría Lagartos Biosphere Reserve	🇲🇽 Mexico	1 of 21	~20%
	Central American Boa			~20%
46	La Amistad International Park (Panama)	🇵🇦 Panama	1 of 21	~20%
	Central American Boa			~20%
47	Yosemite National Park	🇺🇸 United States	1 of 21	~10%
	Northern Rubber Boa			~10%
48	Marino Ballena National Park	🇨🇷 Costa Rica	1 of 21	~10%
	Central American Boa			~10%
49	Arrecifes de Cozumel National Park	🇲🇽 Mexico	1 of 21	~10%
	Central American Boa			~10%
50	El Vizcaíno Biosphere Reserve	🇲🇽 Mexico	1 of 21	~10%
	Rosy Boa			~10%
51	Calakmul Biosphere Reserve	🇲🇽 Mexico	1 of 21	~10%
	Central American Boa			~10%
52	Death Valley National Park	🇺🇸 United States	1 of 21	~10%
	Northern Three-lined Boa			~10%
53	Parque Natural Metropolitano	🇵🇦 Panama	1 of 21	~10%
	Central American Boa			~10%
54	Tapantí-Macizo de la Muerte National Park	🇨🇷 Costa Rica	1 of 21	~10%
	Central American Boa			~10%
55	Carara National Park	🇨🇷 Costa Rica	1 of 21	~10%
	Central American Boa			~10%
56	Grand Teton National Park	🇺🇸 United States	1 of 21	~10%
	Northern Rubber Boa			~10%
57	Yellowstone National Park	🇺🇸 United States	1 of 21	~10%
	Northern Rubber Boa			~10%

Cities Ranked

#	City	Country	Species	Daily sighting probability
1	Salvador	🇧🇷 Brazil	2 of 21	~40%
	Boa Constrictor			~30%
	Anaconda			~20%
2	Recife	🇧🇷 Brazil	2 of 21	~40%
	Boa Constrictor			~30%
	Garden Tree Boa			~20%
3	Campo Grande	🇧🇷 Brazil	1 of 21	~40%
	Boa Constrictor			~40%
4	Manaus	🇧🇷 Brazil	1 of 21	~30%
	Boa Constrictor			~30%
5	San Pedro Sula	🇭🇳 Honduras	1 of 21	~30%
	Central American Boa			~30%
6	São Luís	🇧🇷 Brazil	1 of 21	~30%
	Boa Constrictor			~30%
7	João Pessoa	🇧🇷 Brazil	1 of 21	~20%
	Boa Constrictor			~20%
8	Rio de Janeiro	🇧🇷 Brazil	1 of 21	~20%
	Boa Constrictor			~20%
9	San José	🇨🇷 Costa Rica	1 of 21	~10%
	Central American Boa			~10%
10	Fortaleza	🇧🇷 Brazil	1 of 21	~10%
	Boa Constrictor			~10%
11	Guayaquil	🇪🇨 Ecuador	1 of 21	~10%
	Central American Boa			~10%
12	San Salvador	🇸🇻 El Salvador	1 of 21	~10%
	Central American Boa			~10%
13	Panama City	🇵🇦 Panama	1 of 21	~10%
	Central American Boa			~10%
14	Maceió	🇧🇷 Brazil	1 of 21	~10%
	Boa Constrictor			~10%
15	Vitória	🇧🇷 Brazil	1 of 21	~10%
	Boa Constrictor			~10%
16	San Diego	🇺🇸 United States	1 of 21	<5%
	Northern Three-lined Boa			<5%
17	Miami	🇺🇸 United States	1 of 21	<5%
	Boa Constrictor			<5%
18	San Francisco	🇺🇸 United States	1 of 21	<5%
	Northern Rubber Boa			<5%

Zoos & Centres Where Found

#	Zoo / Centre	Country
1	Disney's Animal Kingdom	🇺🇸 United States	In captivity
2	Everland	🇰🇷 South Korea	In captivity
3	San Diego Zoo	🇺🇸 United States	In captivity
4	Moscow Zoo	🇷🇺 Russia	In captivity
5	Pairi Daiza	🇧🇪 Belgium	In captivity
6	Prague Zoo	🇨🇿 Czechia	In captivity
7	National Zoological Park	🇺🇸 United States	In captivity
8	Shedd Aquarium	🇺🇸 United States	In captivity
9	ZooParc de Beauval	🇫🇷 France	In captivity
10	Skansen	🇸🇪 Sweden	In captivity
11	Cleveland Metroparks Zoo	🇺🇸 United States	In captivity
12	Cincinnati Zoo and Botanical Garden	🇺🇸 United States	In captivity
13	Aquarium of Genoa	🇮🇹 Italy	In captivity
14	California Academy of Sciences	🇺🇸 United States	In captivity
15	Lisbon Oceanarium	🇵🇹 Portugal	In captivity
16	Antwerp Zoo	🇧🇪 Belgium	In captivity
17	Parque das Aves	🇧🇷 Brazil	In captivity
18	Barcelona Zoo	🇪🇸 Spain	In captivity
19	Australia Zoo	🇦🇺 Australia	In captivity
20	Zlín-Lešná Zoo	🇨🇿 Czechia	In captivity
21	Paris Zoological Park	🇫🇷 France	In captivity
22	Zoo Pilsen	🇨🇿 Czechia	In captivity
23	Parc Phœnix	🇫🇷 France	In captivity
24	Jihlava Zoo	🇨🇿 Czechia	In captivity
25	Greensboro Science Center	🇺🇸 United States	In captivity
26	Zoologic park de Lille	🇫🇷 France	In captivity
27	Zoo de Doué	🇫🇷 France	In captivity
28	Brno Zoo	🇨🇿 Czechia	In captivity
29	Abilene Zoological Gardens	🇺🇸 United States	In captivity
30	Kaliningrad Zoo	🇷🇺 Russia	In captivity
31	Aquarium du palais de la Porte Dorée	🇫🇷 France	In captivity
32	Espace zoologique de La Boissière-du-Doré	🇫🇷 France	In captivity
33	Zoobotánico Jerez	🇪🇸 Spain	In captivity
34	Karagandy Zoo	🇰🇿 Kazakhstan	In captivity
35	Parque Temático Hacienda Nápoles	🇨🇴 Colombia	In captivity
36	Nandankanan Zoological Park	🇮🇳 India	In captivity
37	Arignar Anna Zoological Park	🇮🇳 India	In captivity
38	Zoo Miami	🇺🇸 United States	In captivity
39	San Diego Zoo Safari Park	🇺🇸 United States	In captivity
40	Taman Safari Indonesia	🇮🇩 Indonesia	In captivity
41	Al Ain Zoo	🇦🇪 United Arab Emirates	In captivity
42	Toronto Zoo	🇨🇦 Canada	In captivity
43	Taman Safari Bogor	🇮🇩 Indonesia	In captivity
44	Parque Zoológico	🇧🇷 Brazil	In captivity
45	Living Desert Zoo and Gardens	🇺🇸 United States	In captivity
46	Bronx Zoo	🇺🇸 United States	In captivity
47	Wildlife Safari	🇺🇸 United States	In captivity
48	Khao Kheow Open Zoo	🇹🇭 Thailand	In captivity
49	Yumka'	🇲🇽 Mexico	In captivity
50	Zoological Garden of Belo Horizonte	🇧🇷 Brazil	In captivity

Show all 50 Show fewer

Challenges

Part of the challengeThe Amazon's Big FiveSouth AmericaJaguarGiant otterHarpy eagleAnacondaRiver dolphin

Boas

Species in this group

Dormilona

Anaconda

Yellow Anaconda

Garden Tree Boa

Nosy Komba ground boa

Dumeril's Boa

Madagascar Ground Boa

Madagascar tree boa

Boa Constrictor

Ringed Tree Boa

Central American Boa

Emerald Tree Boa

Bates's Tree Boa

Northern Rubber Boa

Western Rainbow Boa

New Guinea ground boa

Eastern Rainbow Boa

Northern Three-lined Boa

Pacific Boa

Rosy Boa

Panamanian Dwarf Boa

Daily sighting probability by month

When they're spotted

Where to see Boas

Parks Ranked

Cities Ranked

Zoos & Centres Where Found

Challenges