Viperidae (Vipèrids)

Family

Vipèrids

Viperidae

152 species in our catalog · found in 202 parks

Species in this group

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

Ceylon Pit Viper

Craspedocephalus trigonocephalus

80–90% · Very likely

Florida Cottonmouth

Agkistrodon conanti

70–80% · Very likely

Barba Amarilla

Bothrops atrox

60–70% · Likely

Side-striped palm pit viper

Bothriechis lateralis

60–70% · Likely

Godman's Montane Pit Viper

Cerrophidion godmani

60–70% · Likely

Northern Cottonmouth

Agkistrodon piscivorus

60–70% · Likely

Wagler's Pit Viper

Tropidolaemus wagleri

50–60% · Likely

Vogel’s Pit Viper

Trimeresurus vogeli

50–60% · Likely

Ruby-eyed Green Pitviper

Craspedocephalus rubeus

50–60% · Likely

Prairie Rattlesnake

Crotalus viridis

50–60% · Likely

North Philippine Temple Pitviper

Tropidolaemus subannulatus

50–60% · Likely

Green Jararaca

Bothrops bilineatus

50–60% · Likely

Fer-de-lance

Bothrops asper

50–60% · Likely

Sidewinder

Crotalus cerastes

50–60% · Likely

Spot-tailed Pitviper

Trimeresurus erythrurus

40–50% · Likely

Cerrado Lancehead

Bothrops pauloensis

40–50% · Likely

Wilson's Montane Pitviper

Cerrophidion wilsoni

40–50% · Likely

Adder

Vipera berus

40–50% · Likely

Neotropical Rattlesnake

Crotalus durissus

40–50% · Likely

Slender Hognose Viper

Porthidium ophryomegas

40–50% · Likely

Patagonia Lancehead

Bothrops ammodytoides

40–50% · Likely

Western Diamondback Rattlesnake

Crotalus atrox

40–50% · Likely

Painted Lancehead

Bothrops diporus

40–50% · Likely

Lowland Hump-nosed Viper

Hypnale zara

40–50% · Likely

Panamint Rattlesnake

Crotalus stephensi

40–50% · Likely

Sabah Bamboo Pitviper

Trimeresurus sabahi

40–50% · Likely

Western Rattlesnake

Crotalus oreganus

30–40% · Possible

Central American Rattlesnake

Crotalus simus

30–40% · Possible

Taiwanese Habu

Protobothrops mucrosquamatus

30–40% · Possible

Urutu Lancehead

Bothrops alternatus

30–40% · Possible

Large-scaled Pit Viper

Craspedocephalus macrolepis

30–40% · Possible

Seoane's Viper

Vipera seoanei

30–40% · Possible

Chinese Green Tree Viper

Trimeresurus stejnegeri

30–40% · Possible

Rainforest Hog-nosed Viper

Porthidium nasutum

30–40% · Possible

Anamala Pit Viper

Craspedocephalus anamallensis

30–40% · Possible

Eastern Black-tailed Rattlesnake

Crotalus ornatus

30–40% · Possible

Asp Viper

Vipera aspis

30–40% · Possible

Puff Adder

Bitis arietans

30–40% · Possible

Eastern Copperhead

Agkistrodon contortrix

30–40% · Possible

Guatemala Palm Pit Viper

Bothriechis bicolor

Insufficient data

Guatemalan Jumping Pitviper

Metlapilcoatlus occiduus

Insufficient data

Malcolm’s Pitviper

Trimeresurus malcolmi

30–40% · Possible

Montatheris hindii

30–40% · Possible

Horned Adder

Bitis caudalis

20–30% · Possible

Nose-horned Viper

Vipera ammodytes

20–30% · Possible

Red Diamond Rattlesnake

Crotalus ruber

20–30% · Possible

Southwestern Speckled Rattlesnake

Crotalus pyrrhus

20–30% · Possible

Beautiful Pitviper

Trimeresurus venustus

20–30% · Possible

Great Lakes Bush Viper

Atheris nitschei

20–30% · Possible

Eastern Diamondback Rattlesnake

Crotalus adamanteus

20–30% · Possible

White-lipped Pit Viper

Trimeresurus albolabris

20–30% · Possible

Central American Jumping Pit Viper

Metlapilcoatlus mexicanus

20–30% · Possible

Timber Rattlesnake

Crotalus horridus

20–30% · Possible

Brazilian Lancehead

Bothrops moojeni

20–30% · Possible

Black-speckled Palm Pit Viper

Bothriechis nigroviridis

20–30% · Possible

Chocoan Forest Pit Viper

Bothrops punctatus

Insufficient data

White-lipped Island Pitviper

Trimeresurus insularis

20–30% · Possible

Kramer's Pit Viper

Trimeresurus macrops

20–30% · Possible

Bolivian Lancehead

Bothrops sanctaecrucis

Insufficient data

Speckled Forest Pit Viper

Bothrops taeniatus

Insufficient data

See all 60 species Show fewer

Showing the 60 most likely of 152 species — the park table below covers them all.

📅 Monthly Probability

Probability-weighted average across the group's species

10–20

Jan

20–30

Feb

20–30

Mar

20–30

Apr

20–30

May

20–30

Jun

20–30

Jul

20–30

Aug

20–30

Sep

20–30

Oct

20–30

Nov

20–30

Dec

🕐 When They're Spotted

When the group's species are recorded (aggregated)

Where to see Vipèrids

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	Sinharaja Forest Reserve	🇱🇰 Sri Lanka	4	90–100%
	Ceylon Pit Viper			80–90%
	Lowland Hump-nosed Viper			40–50%
	Russell's Viper			10–20%
	Hump-nosed Viper			Insufficient data
2	Kinabalu Park	🇲🇾 Malaysia	6	80–90%
	North Philippine Temple Pitviper			40–50%
	Sabah Bamboo Pitviper			40–50%
	Malcolm’s Pitviper			30–40%
	Sumatra Pit Viper			20–30%
	Chasen’s Mountain Pitviper			20–30%
	Borneo Pit Viper			10–20%
3	Emas National Park	🇧🇷 Brazil	5	80–90%
	Cerrado Lancehead			40–50%
	Neotropical Rattlesnake			40–50%
	Urutu Lancehead			30–40%
	Brazilian Lancehead			20–30%
	Mato Grosso Lancehead			Insufficient data
4	El Triunfo	🇲🇽 Mexico	4	80–90%
	Godman's Montane Pit Viper			60–70%
	Guatemala Palm Pit Viper			Insufficient data
	Guatemalan Jumping Pitviper			Insufficient data
	Fer-de-lance			Insufficient data
5	Brownsberg Nature Park	🇸🇷 Suriname	2	80–90%
	Barba Amarilla			60–70%
	Green Jararaca			50–60%
6	Big Cypress National Preserve	🇺🇸 United States	3	80–90%
	Florida Cottonmouth			70–80%
	Eastern Diamondback Rattlesnake			20–30%
	Pygmy Rattlesnake			5–10%
7	Death Valley National Park	🇺🇸 United States	4	70–80%
	Sidewinder			50–60%
	Panamint Rattlesnake			40–50%
	Western Rattlesnake			10–20%
	Mohave Rattlesnake			10–20%
8	Congaree National Park	🇺🇸 United States	3	70–80%
	Northern Cottonmouth			60–70%
	Eastern Copperhead			30–40%
	Timber Rattlesnake			10–20%
9	Braulio Carrillo National Park	🇨🇷 Costa Rica	6	70–80%
	Fer-de-lance			50–60%
	Rainforest Hog-nosed Viper			20–30%
	Side-striped palm pit viper			10–20%
	Black-speckled Palm Pit Viper			10–20%
	Central American Bushmaster			Insufficient data
	Picado's Pit Viper			Insufficient data
10	Khao Sok National Park	🇹🇭 Thailand	4	70–80%
	Wagler's Pit Viper			50–60%
	Sabah Bamboo Pitviper			20–30%
	Malayan Pit Viper			Insufficient data
	Indo-Malayan mountain pitviper			Insufficient data
11	Big Bend National Park	🇺🇸 United States	5	70–80%
	Western Diamondback Rattlesnake			40–50%
	Eastern Black-tailed Rattlesnake			30–40%
	Mohave Rattlesnake			10–20%
	Rock Rattlesnake			5–10%
	Broad-banded Copperhead			Insufficient data
12	Santa Rosa National Park	🇨🇷 Costa Rica	3	70–80%
	Slender Hognose Viper			40–50%
	Central American Rattlesnake			30–40%
	Southern Cantil			Insufficient data
13	Monteverde Cloud Forest Reserve	🇨🇷 Costa Rica	4	60–70%
	Side-striped palm pit viper			60–70%
	Black-speckled Palm Pit Viper			5–10%
	Fer-de-lance			<5%
	Slender Hognose Viper			Insufficient data
14	Khao Yai National Park	🇹🇭 Thailand	4	60–70%
	Vogel’s Pit Viper			50–60%
	Kramer's Pit Viper			20–30%
	Siamese Russell's Viper			Insufficient data
	White-lipped Pit Viper			Insufficient data
15	Cat Tien National Park	🇻🇳 Vietnam	3	60–70%
	Ruby-eyed Green Pitviper			50–60%
	White-lipped Pit Viper			20–30%
	Taiwanese Habu			Insufficient data
16	Tenorio Volcano National Park	🇨🇷 Costa Rica	4	60–70%
	Fer-de-lance			40–50%
	Rainforest Hog-nosed Viper			20–30%
	Side-striped palm pit viper			Insufficient data
	Central American Jumping Pit Viper			5–10%
17	Cuc Phuong National Park	🇻🇳 Vietnam	3	60–70%
	Taiwanese Habu			30–40%
	Chinese Green Tree Viper			30–40%
	White-lipped Pit Viper			Insufficient data
18	Danum Valley Conservation Area	🇲🇾 Malaysia	2	60–70%
	North Philippine Temple Pitviper			50–60%
	Sumatra Pit Viper			10–20%
19	Guadalupe Mountains National Park	🇺🇸 United States	3	60–70%
	Western Diamondback Rattlesnake			30–40%
	Eastern Black-tailed Rattlesnake			20–30%
	Rock Rattlesnake			10–20%
20	Pico Bonito National Park	🇭🇳 Honduras	3	60–70%
	Rainforest Hog-nosed Viper			30–40%
	Central American Jumping Pit Viper			20–30%
	Fer-de-lance			20–30%
21	Utría National Natural Park	🇨🇴 Colombia	4	60–70%
	Fer-de-lance			20–30%
	Chocoan Forest Pit Viper			Insufficient data
	Rainforest Hog-nosed Viper			Insufficient data
	Chocoan Bushmaster			Insufficient data
22	Amboró National Park	🇧🇴 Bolivia	6	60–70%
	Bolivian Lancehead			Insufficient data
	Neotropical Rattlesnake			Insufficient data
	Atlantic Forest Bushmaster			Insufficient data
	Painted Lancehead			Insufficient data
	Andean Lancehead			Insufficient data
	Bothrops monsignifer			Insufficient data
23	Piedras Blancas National Park	🇨🇷 Costa Rica	3	60–70%
	Fer-de-lance			50–60%
	White-tailed Hognose Viper			10–20%
	Side-striped palm pit viper			Insufficient data
24	Serra da Canastra National Park	🇧🇷 Brazil	5	50–60%
	Neotropical Rattlesnake			20–30%
	Marbled lancehead			20–30%
	Jararaca Pintada			Insufficient data
	Urutu Lancehead			Insufficient data
	Brazilian Lancehead			Insufficient data
25	Triglav National Park	🇸🇮 Slovenia	3	50–60%
	Adder			30–40%
	Nose-horned Viper			20–30%
	Asp Viper			Insufficient data
26	Cusuco National Park	🇭🇳 Honduras	4	50–60%
	Wilson's Montane Pitviper			30–40%
	March's Palm Pit Viper			10–20%
	Fer-de-lance			Insufficient data
	Central American Jumping Pit Viper			5–10%
27	Badlands National Park	🇺🇸 United States	1	50–60%
	Prairie Rattlesnake			50–60%
28	La Tigra National Park	🇭🇳 Honduras	2	50–60%
	Wilson's Montane Pitviper			40–50%
	🦎 Honduras Jumping Pit Viper			Insufficient data
29	Chirripó National Park	🇨🇷 Costa Rica	7	50–60%
	Side-striped palm pit viper			20–30%
	Costa Rica Montane Pitviper			10–20%
	Blotched Palm-pitviper			10–20%
	Black-speckled Palm Pit Viper			10–20%
	Fer-de-lance			Insufficient data
	Talamancan Palm Pit Viper			Insufficient data
	Central American Jumping Pit Viper			Insufficient data
30	Arenal Volcano National Park	🇨🇷 Costa Rica	4	50–60%
	Fer-de-lance			30–40%
	Central American Jumping Pit Viper			10–20%
	Rainforest Hog-nosed Viper			10–20%
	Side-striped palm pit viper			5–10%
31	Everglades National Park	🇺🇸 United States	3	50–60%
	Florida Cottonmouth			40–50%
	Eastern Diamondback Rattlesnake			10–20%
	Pygmy Rattlesnake			5–10%
32	Joshua Tree National Park	🇺🇸 United States	6	50–60%
	Southwestern Speckled Rattlesnake			20–30%
	Sidewinder			10–20%
	Western Rattlesnake			5–10%
	Mohave Rattlesnake			5–10%
	Red Diamond Rattlesnake			5–10%
	Western Diamondback Rattlesnake			<5%
33	El Vizcaíno Biosphere Reserve	🇲🇽 Mexico	4	50–60%
	Red Diamond Rattlesnake			20–30%
	Speckled Rattlesnake			10–20%
	Lower California Rattlesnake			10–20%
	Western Rattlesnake			Insufficient data
34	Sequoia and Kings Canyon National Parks	🇺🇸 United States	3	50–60%
	Western Rattlesnake			30–40%
	Panamint Rattlesnake			10–20%
	Sidewinder			Insufficient data
35	Khao Luang National Park	🇹🇭 Thailand	4	50–60%
	Beautiful Pitviper			20–30%
	Malayan Pit Viper			Insufficient data
	Sabah Bamboo Pitviper			Insufficient data
	Palm vit viper			Insufficient data
36	El Impenetrable National Park	🇦🇷 Argentina	2	50–60%
	Painted Lancehead			40–50%
	Neotropical Rattlesnake			Insufficient data
37	Sundarbans National Park	🇮🇳 India	1	40–50%
	Spot-tailed Pitviper			40–50%
38	Tatra National Park	🇸🇰 Slovakia	1	40–50%
	Adder			40–50%
39	Cordillera Azul National Park	🇵🇪 Peru	4	40–50%
	Barba Amarilla			20–30%
	Green Jararaca			10–20%
	Atlantic Forest Bushmaster			Insufficient data
	Small-eyed Toad-headed Pitviper			Insufficient data
40	Shenandoah National Park	🇺🇸 United States	2	40–50%
	Eastern Copperhead			20–30%
	Timber Rattlesnake			20–30%
41	Canaima National Park	🇻🇪 Venezuela	2	40–50%
	Barba Amarilla			Insufficient data
	Speckled Forest Pit Viper			Insufficient data
42	Península Valdés	🇦🇷 Argentina	1	40–50%
	Patagonia Lancehead			40–50%
43	Chapada Diamantina National Park	🇧🇷 Brazil	4	40–50%
	Neotropical Rattlesnake			20–30%
	Whitetail Lancehead			20–30%
	Yarará Lancehead			Insufficient data
	Caatinga Lancehead			Insufficient data
44	Celaque National Park	🇭🇳 Honduras	3	40–50%
	Central American Rattlesnake			Insufficient data
	Wilson's Montane Pitviper			Insufficient data
	🦎 Honduras Jumping Pit Viper			Insufficient data
45	Namib-Naukluft National Park	🇳🇦 Namibia	3	40–50%
	Horned Adder			20–30%
	🦎 Many-horned Adder			10–20%
	Puff Adder			5–10%
46	Manuel Antonio National Park	🇨🇷 Costa Rica	1	40–50%
	Fer-de-lance			40–50%
47	Great Smoky Mountains National Park	🇺🇸 United States	2	40–50%
	Eastern Copperhead			20–30%
	Timber Rattlesnake			20–30%
48	Corcovado National Park	🇨🇷 Costa Rica	3	40–50%
	Fer-de-lance			40–50%
	Black-headed Bushmaster			Insufficient data
	White-tailed Hognose Viper			Insufficient data
49	Eravikulam National Park	🇮🇳 India	2	40–50%
	Large-scaled Pit Viper			30–40%
	Anamala Pit Viper			Insufficient data
50	Garden Route National Park	🇿🇦 South Africa	4	40–50%
	Puff Adder			20–30%
	Rhombic Night Adder			10–20%
	Berg Adder			5–10%
	Red Adder			Insufficient data
51	Volcán Barú National Park	🇵🇦 Panama	3	40–50%
	Black-speckled Palm Pit Viper			20–30%
	Side-striped palm pit viper			Insufficient data
	Costa Rica Montane Pitviper			Insufficient data
52	Grand Canyon National Park	🇺🇸 United States	5	40–50%
	Western Rattlesnake			20–30%
	Southwestern Speckled Rattlesnake			10–20%
	Western Black-tailed Rattlesnake			Insufficient data
	Mohave Rattlesnake			Insufficient data
	Sidewinder			Insufficient data
53	Periyar National Park	🇮🇳 India	2	30–40%
	Anamala Pit Viper			30–40%
	Large-scaled Pit Viper			Insufficient data
54	Montes Azules Biosphere Reserve	🇲🇽 Mexico	3	30–40%
	Central American Jumping Pit Viper			10–20%
	Rainforest Hog-nosed Viper			10–20%
	Fer-de-lance			10–20%
55	Podocarpus National Park	🇪🇨 Ecuador	5	30–40%
	Andean Forest-pitviper			10–20%
	🦎 Lojan Lancehead			10–20%
	Barba Amarilla			5–10%
	Speckled Forest Pit Viper			Insufficient data
	Atlantic Forest Bushmaster			Insufficient data
56	Manu National Park	🇵🇪 Peru	7	30–40%
	Barba Amarilla			10–20%
	Green Jararaca			5–10%
	Brazil's Lancehead			5–10%
	Atlantic Forest Bushmaster			5–10%
	Speckled Forest Pit Viper			Insufficient data
	Andean Lancehead			Insufficient data
	Small-eyed Toad-headed Pitviper			Insufficient data
57	Iguaçu National Park	🇧🇷 Brazil	6	30–40%
	Brazilian Lancehead			10–20%
	Neotropical Rattlesnake			10–20%
	Painted Lancehead			5–10%
	Jararacussu			5–10%
	Jararaca Pintada			Insufficient data
	Yarará Lancehead			Insufficient data
58	Serra dos Órgãos National Park	🇧🇷 Brazil	3	30–40%
	Yarará Lancehead			20–30%
	Jararacussu			10–20%
	Neotropical Rattlesnake			Insufficient data
59	Kibale National Park	🇺🇬 Uganda	4	30–40%
	African Bush Viper			Insufficient data
	Rhinoceros Viper			Insufficient data
	Forest Night Adder			Insufficient data
	African Hairy Bush Viper			Insufficient data
60	Rincón de la Vieja National Park	🇨🇷 Costa Rica	3	30–40%
	Fer-de-lance			Insufficient data
	Central American Rattlesnake			Insufficient data
	Central American Jumping Pit Viper			Insufficient data
61	Iguazú National Park	🇦🇷 Argentina	6	30–40%
	Brazilian Lancehead			10–20%
	Neotropical Rattlesnake			5–10%
	Jararacussu			5–10%
	Painted Lancehead			5–10%
	Jararaca Pintada			Insufficient data
	Yarará Lancehead			Insufficient data
62	Snowdonia National Park	🇬🇧 United Kingdom	1	30–40%
	Adder			30–40%
63	Nyungwe National Park	🇷🇼 Rwanda	2	30–40%
	Great Lakes Bush Viper			20–30%
	Rhinoceros Viper			Insufficient data
64	Picos de Europa National Park	🇪🇸 Spain	1	30–40%
	Seoane's Viper			30–40%
65	Gandoca-Manzanillo Wildlife Refuge	🇨🇷 Costa Rica	3	30–40%
	Rainforest Hog-nosed Viper			10–20%
	Fer-de-lance			10–20%
	Central American Bushmaster			5–10%
66	Henri Pittier National Park	🇻🇪 Venezuela	2	30–40%
	Barba Amarilla			20–30%
	Neotropical Rattlesnake			10–20%
67	Tambopata National Reserve	🇵🇪 Peru	4	30–40%
	Atlantic Forest Bushmaster			10–20%
	Barba Amarilla			10–20%
	Green Jararaca			10–20%
	Brazil's Lancehead			Insufficient data
68	Mercantour National Park	🇫🇷 France	2	30–40%
	Asp Viper			30–40%
	Meadow Viper			Insufficient data
69	Bahía de Loreto National Park	🇲🇽 Mexico	4	30–40%
	Red Diamond Rattlesnake			10–20%
	Speckled Rattlesnake			10–20%
	Lower California Rattlesnake			5–10%
	Santa Catalina Island Rattlesnake			5–10%
70	Darién National Park	🇵🇦 Panama	4	30–40%
	Fer-de-lance			10–20%
	Rainforest Hog-nosed Viper			10–20%
	Lansberg's Hognose Viper			5–10%
	Chocoan Bushmaster			Insufficient data
71	Cairngorms National Park	🇬🇧 United Kingdom	1	30–40%
	Adder			30–40%
72	Itatiaia National Park	🇧🇷 Brazil	3	30–40%
	Yarará Lancehead			20–30%
	Neotropical Rattlesnake			Insufficient data
	Fonseca's Lancehead			Insufficient data
73	Pyrénées National Park	🇫🇷 France	3	30–40%
	Asp Viper			20–30%
	Seoane's Viper			5–10%
	Lataste's Viper			Insufficient data
74	Calakmul Biosphere Reserve	🇲🇽 Mexico	4	30–40%
	Yucatán Neotropical Rattlesnake			10–20%
	Fer-de-lance			10–20%
	Yucatecan Cantil			Insufficient data
	Yucatán Hognose Viper			Insufficient data
75	La Amistad International Park (Panama)	🇵🇦 Panama	10	30–40%
	Fer-de-lance			10–20%
	Black-speckled Palm Pit Viper			5–10%
	Side-striped palm pit viper			5–10%
	Rainforest Hog-nosed Viper			<5%
	Central American Jumping Pit Viper			Insufficient data
	Costa Rica Montane Pitviper			<5%
	Blotched Palm-pitviper			<5%
	Central American Bushmaster			Insufficient data
	Lansberg's Hognose Viper			Insufficient data
	Ujarran Hognose Viper			Insufficient data
76	Reserva de la Biosfera Mariposa Monarca	🇲🇽 Mexico	4	30–40%
	Dusky Rattlesnake			10–20%
	Western Black-tailed Rattlesnake			Insufficient data
	Tlaloc's Rattlesnake			Insufficient data
	Mexican Lancehead Rattlesnake			Insufficient data
77	Tayrona National Natural Park	🇨🇴 Colombia	2	30–40%
	Fer-de-lance			20–30%
	Lansberg's Hognose Viper			10–20%
78	Taroko National Park	🇹🇼 Taiwan	4	30–40%
	Chinese Green Tree Viper			10–20%
	Kikuchi Habu			10–20%
	Taiwanese Habu			Insufficient data
	Taiwan mountain pitviper			Insufficient data
79	Sierra de la Macarena National Park	🇨🇴 Colombia	2	30–40%
	Barba Amarilla			20–30%
	Speckled Forest Pit Viper			Insufficient data
80	Ruaha National Park	🇹🇿 Tanzania	1	30–40%
	Puff Adder			30–40%
81	Aigüestortes National Park	🇪🇸 Spain	1	30–40%
	Asp Viper			30–40%
82	Kaeng Krachan National Park	🇹🇭 Thailand	3	30–40%
	White-lipped Pit Viper			20–30%
	Chinese Mountain Pit Viper			Insufficient data
	Wagler's Pit Viper			Insufficient data
83	Zion National Park	🇺🇸 United States	2	30–40%
	Western Rattlesnake			20–30%
	Sidewinder			Insufficient data
84	Addo Elephant National Park	🇿🇦 South Africa	4	30–40%
	Puff Adder			10–20%
	Rhombic Night Adder			10–20%
	Albany Adder			<5%
	Berg Adder			Insufficient data
85	Farallones de Cali National Natural Park	🇨🇴 Colombia	4	30–40%
	Fer-de-lance			Insufficient data
	Highland Eyelash-Pitviper			10–20%
	Chocoan Forest Pit Viper			Insufficient data
	Chocoan Bushmaster			Insufficient data
86	Aberdare National Park	🇰🇪 Kenya	1	30–40%
	Kenya Montane Viper			30–40%
87	Sian Ka'an Biosphere Reserve	🇲🇽 Mexico	3	20–30%
	Fer-de-lance			20–30%
	Yucatán Hognose Viper			Insufficient data
	Yucatán Neotropical Rattlesnake			Insufficient data
88	Cahuita National Park	🇨🇷 Costa Rica	3	20–30%
	Rainforest Hog-nosed Viper			10–20%
	Fer-de-lance			10–20%
	Central American Bushmaster			Insufficient data
89	Taï National Park	🇨🇮 Ivory Coast	2	20–30%
	Rhinoceros Viper			Insufficient data
	Spotted Night Adder			Insufficient data
90	Yasuní National Park	🇪🇨 Ecuador	4	20–30%
	Barba Amarilla			10–20%
	Green Jararaca			5–10%
	Amazonian Toad-headed Pitviper			Insufficient data
	Atlantic Forest Bushmaster			Insufficient data
91	Cumbres de Monterrey National Park	🇲🇽 Mexico	9	20–30%
	Western Diamondback Rattlesnake			5–10%
	Tamaulipan Rock Rattlesnake			5–10%
	Totonacan Rattlesnake			<5%
	Rock Rattlesnake			<5%
	Western Black-tailed Rattlesnake			<5%
	Mohave Rattlesnake			Insufficient data
	Twin-spotted Rattlesnake			<5%
	Eastern Black-tailed Rattlesnake			<5%
	Taylor's Cantil			<5%
92	Yosemite National Park	🇺🇸 United States	1	20–30%
	Western Rattlesnake			20–30%
93	Kerinci Seblat National Park	🇮🇩 Indonesia	3	20–30%
	Wagler's Pit Viper			Insufficient data
	Sabah Bamboo Pitviper			Insufficient data
	Ashy Pit Viper			Insufficient data
94	Bavarian Forest National Park	🇩🇪 Germany	1	20–30%
	Adder			20–30%
95	Madidi National Park	🇧🇴 Bolivia	4	20–30%
	Atlantic Forest Bushmaster			Insufficient data
	Barba Amarilla			5–10%
	Neotropical Rattlesnake			Insufficient data
	Green Jararaca			Insufficient data
96	Noel Kempff Mercado National Park	🇧🇴 Bolivia	1	20–30%
	Neotropical Rattlesnake			Insufficient data
97	Gobi Gurvansaikhan National Park	🇲🇳 Mongolia	2	20–30%
	Halys Pit Viper			Insufficient data
	Alashan Pitviper			Insufficient data
98	Kanha National Park	🇮🇳 India	2	20–30%
	Common Bamboo Viper			20–30%
	Salazar's Pit Viper			Insufficient data
99	Soberanía National Park	🇵🇦 Panama	1	20–30%
	Fer-de-lance			20–30%
100	Los Quetzales National Park	🇨🇷 Costa Rica	5	20–30%
	Talamancan Palm Pit Viper			10–20%
	Costa Rica Montane Pitviper			Insufficient data
	Fer-de-lance			Insufficient data
	Side-striped palm pit viper			Insufficient data
	Black-speckled Palm Pit Viper			Insufficient data
101	Bali Barat National Park	🇮🇩 Indonesia	1	20–30%
	White-lipped Island Pitviper			20–30%
102	Kgalagadi Transfrontier Park	🇿🇦 South Africa	2	20–30%
	Puff Adder			20–30%
	Horned Adder			Insufficient data
103	Chagres National Park	🇵🇦 Panama	2	20–30%
	Rainforest Hog-nosed Viper			10–20%
	Fer-de-lance			10–20%
104	Kidepo Valley National Park	🇺🇬 Uganda	1	20–30%
	Puff Adder			Insufficient data
105	Iberá National Park	🇦🇷 Argentina	1	20–30%
	Urutu Lancehead			20–30%
106	Amacayacu National Natural Park	🇨🇴 Colombia	1	20–30%
	Barba Amarilla			20–30%
107	Niokolo-Koba National Park	🇸🇳 Senegal	1	20–30%
	Puff Adder			Insufficient data
108	Bwindi Impenetrable National Park	🇺🇬 Uganda	2	20–30%
	Great Lakes Bush Viper			10–20%
	Rhinoceros Viper			Insufficient data
109	Palo Verde National Park	🇨🇷 Costa Rica	2	20–30%
	Slender Hognose Viper			10–20%
	Central American Rattlesnake			Insufficient data
110	Chapada dos Guimarães National Park	🇧🇷 Brazil	2	20–30%
	Brazilian Lancehead			Insufficient data
	Neotropical Rattlesnake			Insufficient data
111	Tapantí-Macizo de la Muerte National Park	🇨🇷 Costa Rica	7	20–30%
	Fer-de-lance			5–10%
	Side-striped palm pit viper			5–10%
	Black-speckled Palm Pit Viper			5–10%
	Rainforest Hog-nosed Viper			Insufficient data
	Costa Rica Montane Pitviper			Insufficient data
	Central American Bushmaster			Insufficient data
	Blotched Palm-pitviper			Insufficient data
112	Cockscomb Basin Wildlife Sanctuary	🇧🇿 Belize	2	20–30%
	Fer-de-lance			10–20%
	Central American Jumping Pit Viper			Insufficient data
113	El Palmar National Park	🇦🇷 Argentina	1	20–30%
	Urutu Lancehead			20–30%
114	Carara National Park	🇨🇷 Costa Rica	1	20–30%
	Fer-de-lance			20–30%
115	Waterberg Plateau Park	🇳🇦 Namibia	1	20–30%
	Puff Adder			Insufficient data
116	Semuliki National Park	🇺🇬 Uganda	1	20–30%
	Gaboon Adder			Insufficient data
117	Cévennes National Park	🇫🇷 France	2	20–30%
	Asp Viper			10–20%
	Adder			5–10%
118	Gorongosa National Park	🇲🇿 Mozambique	2	20–30%
	Snouted Night Adder			10–20%
	Puff Adder			Insufficient data
119	Cuyabeno Wildlife Reserve	🇪🇨 Ecuador	4	20–30%
	Barba Amarilla			10–20%
	Green Jararaca			5–10%
	Amazonian Toad-headed Pitviper			Insufficient data
	Atlantic Forest Bushmaster			Insufficient data
120	Table Mountain National Park	🇿🇦 South Africa	2	20–30%
	Puff Adder			10–20%
	Berg Adder			<5%
121	South Luangwa National Park	🇿🇲 Zambia	3	20–30%
	Snouted Night Adder			Insufficient data
	Rhombic Night Adder			Insufficient data
	Puff Adder			Insufficient data
122	Tortuguero National Park	🇨🇷 Costa Rica	2	20–30%
	Fer-de-lance			10–20%
	Rainforest Hog-nosed Viper			Insufficient data
123	Doi Inthanon National Park	🇹🇭 Thailand	3	10–20%
	Chinese Mountain Pit Viper			10–20%
	Guo's Green Pit Viper			Insufficient data
	Kramer's Pit Viper			Insufficient data
124	Marino Ballena National Park	🇨🇷 Costa Rica	1	10–20%
	Fer-de-lance			10–20%
125	Kruger National Park	🇿🇦 South Africa	3	10–20%
	Puff Adder			10–20%
	Snouted Night Adder			5–10%
	Rhombic Night Adder			Insufficient data
126	Kafue National Park	🇿🇲 Zambia	2	10–20%
	Puff Adder			Insufficient data
	Rhombic Night Adder			Insufficient data
127	Poás Volcano National Park	🇨🇷 Costa Rica	1	10–20%
	Side-striped palm pit viper			Insufficient data
128	San Lorenzo Protected Forest	🇵🇦 Panama	1	10–20%
	Fer-de-lance			Insufficient data
129	Gonarezhou National Park	🇿🇼 Zimbabwe	1	10–20%
	Puff Adder			Insufficient data
130	Tijuca National Park	🇧🇷 Brazil	2	10–20%
	Yarará Lancehead			10–20%
	Jararacussu			5–10%
131	Gauja National Park	🇱🇻 Latvia	1	10–20%
	Adder			Insufficient data
132	Nagarhole National Park	🇮🇳 India	2	10–20%
	Hump-nosed Viper			Insufficient data
	Malabar Pit-viper			Insufficient data
133	Nikko National Park	🇯🇵 Japan	1	10–20%
	Short-tailed Mamushi			Insufficient data
134	Anavilhanas National Park	🇧🇷 Brazil	1	10–20%
	Barba Amarilla			10–20%
135	iSimangaliso Wetland Park	🇿🇦 South Africa	4	10–20%
	Puff Adder			5–10%
	Gaboon Adder			5–10%
	Snouted Night Adder			Insufficient data
	Rhombic Night Adder			Insufficient data
136	Samburu National Reserve	🇰🇪 Kenya	2	10–20%
	Puff Adder			Insufficient data
	Egyptian Saw-scaled Viper			Insufficient data
137	Kinabatangan Wildlife Sanctuary	🇲🇾 Malaysia	2	10–20%
	North Philippine Temple Pitviper			10–20%
	Borneo Pit Viper			Insufficient data
138	Satpura National Park	🇮🇳 India	2	10–20%
	Russell's Viper			Insufficient data
	Saw-scaled Viper			Insufficient data
139	Selous Game Reserve	🇹🇿 Tanzania	1	10–20%
	Puff Adder			Insufficient data
140	Virunga National Park	🇨🇩 Democratic Republic of the Congo	4	10–20%
	Great Lakes Bush Viper			5–10%
	Rhinoceros Viper			Insufficient data
	Puff Adder			Insufficient data
	African Hairy Bush Viper			Insufficient data
141	Cerro Azul Meámbar National Park	🇭🇳 Honduras	2	10–20%
	Central American Jumping Pit Viper			Insufficient data
	Fer-de-lance			Insufficient data
142	Way Kambas National Park	🇮🇩 Indonesia	1	10–20%
	Wagler's Pit Viper			Insufficient data
143	Ordesa y Monte Perdido National Park	🇪🇸 Spain	1	10–20%
	Asp Viper			10–20%
144	Murchison Falls National Park	🇺🇬 Uganda	2	10–20%
	Puff Adder			Insufficient data
	Gaboon Adder			Insufficient data
145	Bastimentos Island National Marine Park	🇵🇦 Panama	1	10–20%
	Fer-de-lance			10–20%
146	Ría Lagartos Biosphere Reserve	🇲🇽 Mexico	1	10–20%
	Yucatán Neotropical Rattlesnake			10–20%
147	Channel Islands National Park	🇺🇸 United States	1	10–20%
	Western Rattlesnake			10–20%
148	Nairobi National Park	🇰🇪 Kenya	1	10–20%
	Puff Adder			Insufficient data
149	Queen Elizabeth National Park	🇺🇬 Uganda	2	10–20%
	Puff Adder			Insufficient data
	Great Lakes Bush Viper			Insufficient data
150	Bandipur National Park	🇮🇳 India	2	10–20%
	Hump-nosed Viper			Insufficient data
	Malabar Pit-viper			Insufficient data
151	Tsavo East National Park	🇰🇪 Kenya	1	10–20%
	Puff Adder			10–20%
152	Khangchendzonga National Park	🇮🇳 India	1	10–20%
	Chinese Mountain Pit Viper			Insufficient data
153	Horton Plains National Park	🇱🇰 Sri Lanka	1	10–20%
	Gloyd's Hump-nosed Viper			Insufficient data
154	Tsavo West National Park	🇰🇪 Kenya	1	10–20%
	Puff Adder			10–20%
155	Mudumalai National Park	🇮🇳 India	1	10–20%
	Malabar Pit-viper			Insufficient data
156	Liwonde National Park	🇲🇼 Malawi	1	10–20%
	Puff Adder			Insufficient data
157	Wilpattu National Park	🇱🇰 Sri Lanka	1	10–20%
	Hump-nosed Viper			Insufficient data
158	Etosha National Park	🇳🇦 Namibia	2	10–20%
	Puff Adder			5–10%
	Horned Adder			Insufficient data
159	Biebrza National Park	🇵🇱 Poland	1	10–20%
	Adder			Insufficient data
160	Machalilla National Park	🇪🇨 Ecuador	2	10–20%
	Fer-de-lance			Insufficient data
	Manabí Hognose Viper			Insufficient data
161	Serengeti National Park	🇹🇿 Tanzania	2	5–10%
	Puff Adder			5–10%
	Green Night Adder			Insufficient data
162	Chingaza National Natural Park	🇨🇴 Colombia	1	5–10%
	🦎 Bothrocophias myrringae			Insufficient data
163	Kiskunság National Park	🇭🇺 Hungary	1	5–10%
	Meadow Viper			Insufficient data
164	Białowieża National Park	🇵🇱 Poland	1	5–10%
	Adder			Insufficient data
165	Mikumi National Park	🇹🇿 Tanzania	1	5–10%
	Puff Adder			Insufficient data
166	Wadden Sea National Park	🇩🇪 Germany	1	5–10%
	Adder			5–10%
167	Volcanoes National Park	🇷🇼 Rwanda	1	5–10%
	Great Lakes Bush Viper			Insufficient data
168	Pilanesberg National Park	🇿🇦 South Africa	1	5–10%
	Puff Adder			5–10%
169	Moremi Game Reserve	🇧🇼 Botswana	1	5–10%
	Puff Adder			5–10%
170	Los Nevados National Natural Park	🇨🇴 Colombia	1	5–10%
	Highland Eyelash-Pitviper			5–10%
171	Akagera National Park	🇷🇼 Rwanda	1	5–10%
	Puff Adder			Insufficient data
172	Jiuzhaigou National Park	🇨🇳 China	1	5–10%
	Jiuzhai pitviper			Insufficient data
173	Redwood National Park	🇺🇸 United States	1	5–10%
	Western Rattlesnake			5–10%
174	Hwange National Park	🇿🇼 Zimbabwe	1	5–10%
	Puff Adder			Insufficient data
175	Langtang National Park	🇳🇵 Nepal	1	5–10%
	Himalayan Pitviper			Insufficient data
176	Coiba National Park	🇵🇦 Panama	1	5–10%
	Fer-de-lance			Insufficient data
177	Masai Mara National Reserve	🇰🇪 Kenya	2	5–10%
	Puff Adder			5–10%
	Green Night Adder			Insufficient data
178	Sierra de Guadarrama National Park	🇪🇸 Spain	1	5–10%
	Lataste's Viper			5–10%
179	Ostional Wildlife Refuge	🇨🇷 Costa Rica	1	5–10%
	Central American Rattlesnake			Insufficient data
180	Arusha National Park	🇹🇿 Tanzania	1	5–10%
	Puff Adder			Insufficient data
181	Ngorongoro Conservation Area	🇹🇿 Tanzania	1	5–10%
	Puff Adder			5–10%
182	Tarangire National Park	🇹🇿 Tanzania	1	5–10%
	Puff Adder			Insufficient data
183	Lake Mburo National Park	🇺🇬 Uganda	1	5–10%
	Green Night Adder			Insufficient data
184	Hluhluwe-Imfolozi Park	🇿🇦 South Africa	2	5–10%
	Puff Adder			Insufficient data
	Snouted Night Adder			Insufficient data
185	Minneriya National Park	🇱🇰 Sri Lanka	1	5–10%
	Hump-nosed Viper			Insufficient data
186	Las Baulas Marine National Park	🇨🇷 Costa Rica	1	5–10%
	Slender Hognose Viper			Insufficient data
187	Parque Natural Metropolitano	🇵🇦 Panama	1	5–10%
	Fer-de-lance			Insufficient data
188	Lake Manyara National Park	🇹🇿 Tanzania	1	5–10%
	Puff Adder			Insufficient data
189	Cañón del Sumidero National Park	🇲🇽 Mexico	2	5–10%
	Tehuantepec Isthmus Neotropical Rattlesnake			Insufficient data
	Central American Rattlesnake			Insufficient data
190	Mkomazi National Park	🇹🇿 Tanzania	1	5–10%
	Green Night Adder			Insufficient data
191	Ranthambore National Park	🇮🇳 India	1	5–10%
	Saw-scaled Viper			Insufficient data
192	Chobe National Park	🇧🇼 Botswana	1	5–10%
	Puff Adder			Insufficient data
193	Lake Nakuru National Park	🇰🇪 Kenya	1	5–10%
	Puff Adder			Insufficient data
194	Lago de Yojoa	🇭🇳 Honduras	1	5–10%
	Fer-de-lance			Insufficient data
195	Parque Estadual Encontro das Águas	🇧🇷 Brazil	1	5–10%
	Brazilian Lancehead			Insufficient data
196	Monfragüe National Park	🇪🇸 Spain	1	5–10%
	Lataste's Viper			Insufficient data
197	Chitwan National Park	🇳🇵 Nepal	1	<5%
	Nepal Pitviper			Insufficient data
198	Yellowstone National Park	🇺🇸 United States	1	<5%
	Prairie Rattlesnake			<5%
199	Yala National Park	🇱🇰 Sri Lanka	1	<5%
	Russell's Viper			Insufficient data
200	Sierra Nevada National Park	🇪🇸 Spain	1	<5%
	Lataste's Viper			<5%
201	Amboseli National Park	🇰🇪 Kenya	1	<5%
	Puff Adder			Insufficient data
202	Doñana National Park	🇪🇸 Spain	1	<5%
	Lataste's Viper			Insufficient data