Genus

Rattlesnakes

Crotalus

25 species in our catalog · found in 44 parks

KingdomAnimalia (Animals)
PhylumChordata (Chordates)
ClassSquamata
FamilyViperidae (Vipers)
GenusCrotalus (Rattlesnakes)

Species in this group

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

Crotalus viridis

Daily sighting probability ~60% · Likely

Crotalus cerastes

Daily sighting probability ~50% · Likely

Crotalus durissus

Daily sighting probability ~50% · Likely

Crotalus atrox

Daily sighting probability ~50% · Likely

Endemic

Crotalus stephensi

Daily sighting probability ~40% · Likely

Crotalus oreganus

Daily sighting probability ~40% · Likely

Crotalus simus

Daily sighting probability ~40% · Likely

Crotalus ornatus

Daily sighting probability ~30% · Possible

Crotalus ruber

Daily sighting probability ~30% · Possible

Crotalus pyrrhus

Daily sighting probability ~30% · Possible

LC Endemic

Crotalus adamanteus

Daily sighting probability ~30% · Possible

Crotalus horridus

Daily sighting probability ~30% · Possible

LC Endemic

Crotalus triseriatus

Daily sighting probability ~20% · Possible

Crotalus lepidus

Daily sighting probability ~20% · Possible

Crotalus tzabcan

Daily sighting probability ~20% · Possible

Crotalus mitchellii

Daily sighting probability ~20% · Possible

LC Endemic

Crotalus enyo

Daily sighting probability ~20% · Possible

Crotalus tigris

Daily sighting probability ~20% · Possible

Crotalus molossus

Daily sighting probability ~10% · With luck

Crotalus scutulatus

Daily sighting probability ~10% · With luck

CR Endemic

Crotalus catalinensis

Daily sighting probability ~10% · With luck

Endemic

Crotalus tlaloci

Daily sighting probability Insufficient data

LC Endemic

Crotalus polystictus

Daily sighting probability Insufficient data

Crotalus cerberus

Daily sighting probability ~10% · With luck

Tehuantepec Isthmus Neotropical Rattlesnake

Crotalus ehecatl

Daily sighting probability Insufficient data

See all 25 species Show fewer

Daily sighting probability by month

Probability-weighted average across the group's species

~10%

Jan

~20%

Feb

~20%

Mar

~30%

Apr

~30%

May

~30%

Jun

~30%

Jul

~30%

Aug

~30%

Sep

~20%

Oct

~20%

Nov

~10%

Dec

When they're spotted

When the group's species are recorded (aggregated)

Where to see Rattlesnakes

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	Death Valley National Park	🇺🇸 United States	4	~80%
	Sidewinder			~50%
	Panamint Rattlesnake			~40%
	Western Rattlesnake			~20%
	Mohave Rattlesnake			~10%
2	Big Bend National Park	🇺🇸 United States	4	~70%
	Western Diamondback Rattlesnake			~50%
	Eastern Black-tailed Rattlesnake			~30%
	Mohave Rattlesnake			~10%
	Rock Rattlesnake			~10%
3	Guadalupe Mountains National Park	🇺🇸 United States	3	~70%
	Western Diamondback Rattlesnake			~40%
	Eastern Black-tailed Rattlesnake			~30%
	Rock Rattlesnake			~20%
4	Saguaro National Park	🇺🇸 United States	6	~60%
	Western Diamondback Rattlesnake			~40%
	Tiger Rattlesnake			~20%
	Western Black-tailed Rattlesnake			~10%
	Arizona Black Rattlesnake			~10%
	Mohave Rattlesnake			~10%
	Sidewinder			<5%
5	Joshua Tree National Park	🇺🇸 United States	6	~60%
	Southwestern Speckled Rattlesnake			~30%
	Sidewinder			~20%
	Western Rattlesnake			~10%
	Red Diamond Rattlesnake			~10%
	Mohave Rattlesnake			~10%
	Western Diamondback Rattlesnake			~10%
6	El Vizcaíno Biosphere Reserve	🇲🇽 Mexico	4	~60%
	Red Diamond Rattlesnake			~30%
	Speckled Rattlesnake			~20%
	Lower California Rattlesnake			~20%
	Western Rattlesnake			Insufficient data
7	Badlands National Park	🇺🇸 United States	1	~60%
	Prairie Rattlesnake			~60%
8	Sequoia and Kings Canyon National Parks	🇺🇸 United States	3	~60%
	Western Rattlesnake			~40%
	Panamint Rattlesnake			~20%
	Sidewinder			Insufficient data
9	Emas National Park	🇧🇷 Brazil	1	~50%
	Neotropical Rattlesnake			~50%
10	Grand Canyon National Park	🇺🇸 United States	5	~50%
	Western Rattlesnake			~30%
	Southwestern Speckled Rattlesnake			~10%
	Western Black-tailed Rattlesnake			Insufficient data
	Mohave Rattlesnake			Insufficient data
	Sidewinder			Insufficient data
11	Santa Rosa National Park	🇨🇷 Costa Rica	1	~40%
	Central American Rattlesnake			~40%
12	Bahía de Loreto National Park	🇲🇽 Mexico	4	~40%
	Red Diamond Rattlesnake			~20%
	Speckled Rattlesnake			~10%
	Lower California Rattlesnake			~10%
	Santa Catalina Island Rattlesnake			~10%
13	Reserva de la Biosfera Mariposa Monarca	🇲🇽 Mexico	4	~40%
	Dusky Rattlesnake			~20%
	Western Black-tailed Rattlesnake			Insufficient data
	Tlaloc's Rattlesnake			Insufficient data
	Mexican Lancehead Rattlesnake			Insufficient data
14	Zion National Park	🇺🇸 United States	2	~40%
	Western Rattlesnake			~30%
	Sidewinder			Insufficient data
15	Cabo Pulmo National Park	🇲🇽 Mexico	3	~40%
	Red Diamond Rattlesnake			Insufficient data
	Lower California Rattlesnake			Insufficient data
	Speckled Rattlesnake			Insufficient data
16	Big Cypress National Preserve	🇺🇸 United States	1	~30%
	Eastern Diamondback Rattlesnake			~30%
17	Shenandoah National Park	🇺🇸 United States	1	~30%
	Timber Rattlesnake			~30%
18	Yosemite National Park	🇺🇸 United States	1	~30%
	Western Rattlesnake			~30%
19	Noel Kempff Mercado National Park	🇧🇴 Bolivia	1	~30%
	Neotropical Rattlesnake			Insufficient data
20	Great Smoky Mountains National Park	🇺🇸 United States	1	~30%
	Timber Rattlesnake			~30%
21	Serra da Canastra National Park	🇧🇷 Brazil	1	~30%
	Neotropical Rattlesnake			~30%
22	Celaque National Park	🇭🇳 Honduras	1	~30%
	Central American Rattlesnake			Insufficient data
23	Chapada Diamantina National Park	🇧🇷 Brazil	1	~30%
	Neotropical Rattlesnake			~30%
24	Everglades National Park	🇺🇸 United States	1	~20%
	Eastern Diamondback Rattlesnake			~20%
25	Henri Pittier National Park	🇻🇪 Venezuela	1	~20%
	Neotropical Rattlesnake			~20%
26	Calakmul Biosphere Reserve	🇲🇽 Mexico	1	~20%
	Yucatán Neotropical Rattlesnake			~20%
27	Ría Lagartos Biosphere Reserve	🇲🇽 Mexico	1	~20%
	Yucatán Neotropical Rattlesnake			~20%
28	Channel Islands National Park	🇺🇸 United States	1	~20%
	Western Rattlesnake			~20%
29	Congaree National Park	🇺🇸 United States	1	~20%
	Timber Rattlesnake			~20%
30	Amboró National Park	🇧🇴 Bolivia	1	~10%
	Neotropical Rattlesnake			Insufficient data
31	Iguaçu National Park	🇧🇷 Brazil	1	~10%
	Neotropical Rattlesnake			~10%
32	Rincón de la Vieja National Park	🇨🇷 Costa Rica	1	~10%
	Central American Rattlesnake			Insufficient data
33	Iguazú National Park	🇦🇷 Argentina	1	~10%
	Neotropical Rattlesnake			~10%
34	El Impenetrable National Park	🇦🇷 Argentina	1	~10%
	Neotropical Rattlesnake			Insufficient data
35	Itatiaia National Park	🇧🇷 Brazil	1	~10%
	Neotropical Rattlesnake			Insufficient data
36	Palo Verde National Park	🇨🇷 Costa Rica	1	~10%
	Central American Rattlesnake			Insufficient data
37	Chapada dos Guimarães National Park	🇧🇷 Brazil	1	~10%
	Neotropical Rattlesnake			Insufficient data
38	Redwood National Park	🇺🇸 United States	1	~10%
	Western Rattlesnake			Insufficient data
39	Cañón del Sumidero National Park	🇲🇽 Mexico	2	~10%
	Tehuantepec Isthmus Neotropical Rattlesnake			Insufficient data
	Central American Rattlesnake			Insufficient data
40	Ostional Wildlife Refuge	🇨🇷 Costa Rica	1	~10%
	Central American Rattlesnake			Insufficient data
41	Madidi National Park	🇧🇴 Bolivia	1	~10%
	Neotropical Rattlesnake			Insufficient data
42	Serra dos Órgãos National Park	🇧🇷 Brazil	1	~10%
	Neotropical Rattlesnake			Insufficient data
43	Sian Ka'an Biosphere Reserve	🇲🇽 Mexico	1	~10%
	Yucatán Neotropical Rattlesnake			Insufficient data
44	Yellowstone National Park	🇺🇸 United States	1	~10%
	Prairie Rattlesnake			~10%