Genus

Garter Snakes

Thamnophis

16 species in our catalog · found in 40 parks

Species in this group

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

Thamnophis sirtalis

Thamnophis radix

Thamnophis elegans

Thamnophis ordinoides

Thamnophis saurita

Thamnophis couchii

Thamnophis pulchrilatus

Thamnophis atratus

Thamnophis scalaris

Thamnophis cyrtopsis

Thamnophis scaliger

Thamnophis proximus

Thamnophis marcianus

Thamnophis melanogaster

Insufficient data

Thamnophis eques

Insufficient data

Thamnophis hammondii

5–10% · Rare

See all 16 species Show fewer

📅 Monthly Probability

Probability-weighted average across the group's species

10–20

Jan

10–20

Feb

20–30

Mar

30–40

Apr

30–40

May

30–40

Jun

30–40

Jul

30–40

Aug

30–40

Sep

30–40

Oct

10–20

Nov

10–20

Dec

🕐 When They're Spotted

When the group's species are recorded (aggregated)

Where to see Garter Snakes

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	Wood Buffalo National Park	🇨🇦 Canada	1	70–80%
	Common Garter Snake			70–80%
2	Redwood National Park	🇺🇸 United States	4	60–70%
	Common Garter Snake			30–40%
	Western Terrestrial Garter Snake			20–30%
	Aquatic Garter Snake			10–20%
	Northwestern Garter Snake			10–20%
3	Cape Breton Highlands National Park	🇨🇦 Canada	1	60–70%
	Common Garter Snake			60–70%
4	Pacific Rim National Park Reserve	🇨🇦 Canada	3	60–70%
	Common Garter Snake			30–40%
	Northwestern Garter Snake			30–40%
	Western Terrestrial Garter Snake			Insufficient data
5	Isle Royale National Park	🇺🇸 United States	1	50–60%
	Common Garter Snake			50–60%
6	Point Pelee National Park	🇨🇦 Canada	1	50–60%
	Common Garter Snake			50–60%
7	Voyageurs National Park	🇺🇸 United States	1	50–60%
	Common Garter Snake			50–60%
8	Reserva de la Biosfera Mariposa Monarca	🇲🇽 Mexico	5	40–50%
	Mexican Highlands Gartersnake			20–30%
	Longtail Alpine Garter Snake			Insufficient data
	Short-tail Alpine Garter Snake			Insufficient data
	Blackbelly Garter Snake			Insufficient data
	Mexican Gartersnake			Insufficient data
9	Acadia National Park	🇺🇸 United States	1	40–50%
	Common Garter Snake			40–50%
10	Sequoia and Kings Canyon National Parks	🇺🇸 United States	2	40–50%
	Western Terrestrial Garter Snake			20–30%
	Western Aquatic Garter Snake			20–30%
11	Elk Island National Park	🇨🇦 Canada	2	40–50%
	Plains Garter Snake			40–50%
	Common Garter Snake			Insufficient data
12	Big Cypress National Preserve	🇺🇸 United States	2	40–50%
	Ribbon Snake			20–30%
	Common Garter Snake			20–30%
13	Olympic National Park	🇺🇸 United States	3	40–50%
	Northwestern Garter Snake			20–30%
	Common Garter Snake			10–20%
	Western Terrestrial Garter Snake			5–10%
14	Great Smoky Mountains National Park	🇺🇸 United States	1	40–50%
	Common Garter Snake			40–50%
15	Great Bear Rainforest	🇨🇦 Canada	3	40–50%
	Common Garter Snake			20–30%
	Northwestern Garter Snake			10–20%
	Western Terrestrial Garter Snake			10–20%
16	Shenandoah National Park	🇺🇸 United States	2	30–40%
	Common Garter Snake			30–40%
	Ribbon Snake			Insufficient data
17	Grand Teton National Park	🇺🇸 United States	2	30–40%
	Western Terrestrial Garter Snake			30–40%
	Common Garter Snake			5–10%
18	Glacier National Park	🇺🇸 United States	2	30–40%
	Western Terrestrial Garter Snake			20–30%
	Common Garter Snake			10–20%
19	Yosemite National Park	🇺🇸 United States	3	30–40%
	Western Terrestrial Garter Snake			10–20%
	Western Aquatic Garter Snake			10–20%
	Common Garter Snake			5–10%
20	Badlands National Park	🇺🇸 United States	2	30–40%
	Plains Garter Snake			20–30%
	Common Garter Snake			Insufficient data
21	Yellowstone National Park	🇺🇸 United States	2	30–40%
	Western Terrestrial Garter Snake			20–30%
	Common Garter Snake			Insufficient data
22	Rocky Mountain National Park	🇺🇸 United States	1	30–40%
	Western Terrestrial Garter Snake			30–40%
23	Zion National Park	🇺🇸 United States	1	20–30%
	Western Terrestrial Garter Snake			20–30%
24	Riding Mountain National Park	🇨🇦 Canada	2	20–30%
	Plains Garter Snake			20–30%
	Common Garter Snake			Insufficient data
25	Everglades National Park	🇺🇸 United States	2	20–30%
	Ribbon Snake			10–20%
	Common Garter Snake			10–20%
26	Big Bend National Park	🇺🇸 United States	2	20–30%
	Black-necked Gartersnake			10–20%
	Checkered Garter Snake			5–10%
27	Banff National Park	🇨🇦 Canada	2	10–20%
	Western Terrestrial Garter Snake			10–20%
	Common Garter Snake			5–10%
28	Congaree National Park	🇺🇸 United States	1	10–20%
	Common Garter Snake			10–20%
29	Jasper National Park	🇨🇦 Canada	2	10–20%
	Western Terrestrial Garter Snake			10–20%
	Common Garter Snake			5–10%
30	Guadalupe Mountains National Park	🇺🇸 United States	1	10–20%
	Black-necked Gartersnake			Insufficient data
31	Cumbres de Monterrey National Park	🇲🇽 Mexico	3	10–20%
	Western Ribbon Snake			5–10%
	Checkered Garter Snake			<5%
	Black-necked Gartersnake			<5%
32	Palo Verde National Park	🇨🇷 Costa Rica	1	10–20%
	Western Ribbon Snake			10–20%
33	Arrecifes de Cozumel National Park	🇲🇽 Mexico	1	5–10%
	Western Ribbon Snake			5–10%
34	Grand Canyon National Park	🇺🇸 United States	2	5–10%
	Western Terrestrial Garter Snake			5–10%
	Black-necked Gartersnake			Insufficient data
35	Channel Islands National Park	🇺🇸 United States	3	5–10%
	Two-striped Garter Snake			5–10%
	Western Terrestrial Garter Snake			Insufficient data
	Common Garter Snake			Insufficient data
36	Celestún Biosphere Reserve	🇲🇽 Mexico	1	5–10%
	Western Ribbon Snake			Insufficient data
37	Lago de Yojoa	🇭🇳 Honduras	1	5–10%
	Checkered Garter Snake			Insufficient data
38	Sian Ka'an Biosphere Reserve	🇲🇽 Mexico	1	<5%
	Western Ribbon Snake			Insufficient data
39	Joshua Tree National Park	🇺🇸 United States	1	<5%
	Two-striped Garter Snake			Insufficient data
40	Gros Morne National Park	🇨🇦 Canada	1	<5%
	Common Garter Snake			Insufficient data

Garter Snakes

Species in this group

Common Garter Snake

Plains Garter Snake

Western Terrestrial Garter Snake

Northwestern Garter Snake

Ribbon Snake

Western Aquatic Garter Snake

Mexican Highlands Gartersnake

Aquatic Garter Snake

Longtail Alpine Garter Snake

Black-necked Gartersnake

Short-tail Alpine Garter Snake

Western Ribbon Snake

Checkered Garter Snake

Blackbelly Garter Snake

Mexican Gartersnake

Two-striped Garter Snake

📅 Monthly Probability

🕐 When They're Spotted

Where to see Garter Snakes

Parks Ranked