Thamnophis (Garter Snakes)

Species in this group

LC

Thamnophis sirtalis

Daily sighting probability ~80% · Very likely

LC

Thamnophis radix

Daily sighting probability ~50% · Likely

LC

Thamnophis elegans

Daily sighting probability ~40% · Likely

LC

Thamnophis proximus

Daily sighting probability ~40% · Likely

LC

Thamnophis ordinoides

Daily sighting probability ~30% · Possible

LC Endemic

Thamnophis pulchrilatus

Daily sighting probability ~30% · Possible

LC

Thamnophis saurita

Daily sighting probability ~30% · Possible

LC

Thamnophis marcianus

Daily sighting probability ~30% · Possible

LC Endemic

Thamnophis couchii

Daily sighting probability ~30% · Possible

LC Endemic

Thamnophis atratus

Daily sighting probability ~20% · Possible

LC

Thamnophis cyrtopsis

Daily sighting probability ~20% · Possible

See all 11 species Show fewer

Daily sighting probability by month

Probability-weighted average across the group's species

~10%

Jan

~10%

Feb

~20%

Mar

~30%

Apr

~40%

May

~30%

Jun

~40%

Jul

~40%

Aug

~40%

Sep

~30%

Oct

~10%

Nov

~10%

Dec

When they're spotted

When the group's species are recorded (aggregated)

Where to see Garter Snakes

Warmer areas are where this group is recorded most often. Shaded: the known ranges of its 19 species, darker where more of them overlap (GARD, Roll et al. 2017 & Caetano et al. 2022). Our parks Our cities In captivity: 38 zoos & centres

Parks Ranked

#	Park	Country	Species	Daily sighting probability
1	Wood Buffalo National Park	🇨🇦 Canada	1 of 11	~80%
	Common Garter Snake			~80%
2	Redwood National Park	🇺🇸 United States	4 of 11	~70%
	Common Garter Snake			~40%
	Aquatic Garter Snake			~20%
	Western Terrestrial Garter Snake			~20%
	Northwestern Garter Snake			~20%
3	Cape Breton Highlands National Park	🇨🇦 Canada	1 of 11	~70%
	Common Garter Snake			~70%
4	Isle Royale National Park	🇺🇸 United States	1 of 11	~70%
	Common Garter Snake			~70%
5	Pacific Rim National Park Reserve	🇨🇦 Canada	2 of 11	~60%
	Common Garter Snake			~40%
	Northwestern Garter Snake			~30%
6	Padre Island National Seashore	🇺🇸 United States	2 of 11	~50%
	Western Ribbon Snake			~40%
	Checkered Garter Snake			~30%
7	Point Pelee National Park	🇨🇦 Canada	1 of 11	~50%
	Common Garter Snake			~50%
8	Voyageurs National Park	🇺🇸 United States	1 of 11	~50%
	Common Garter Snake			~50%
9	Sequoia and Kings Canyon National Parks	🇺🇸 United States	2 of 11	~50%
	Western Terrestrial Garter Snake			~30%
	Western Aquatic Garter Snake			~30%
10	Great Bear Rainforest	🇨🇦 Canada	3 of 11	~50%
	Northwestern Garter Snake			~20%
	Common Garter Snake			~20%
	Western Terrestrial Garter Snake			~20%
11	Acadia National Park	🇺🇸 United States	1 of 11	~50%
	Common Garter Snake			~50%
12	Elk Island National Park	🇨🇦 Canada	1 of 11	~50%
	Plains Garter Snake			~50%
13	Big Cypress National Preserve	🇺🇸 United States	2 of 11	~50%
	Ribbon Snake			~30%
	Common Garter Snake			~20%
14	Olympic National Park	🇺🇸 United States	2 of 11	~50%
	Northwestern Garter Snake			~30%
	Common Garter Snake			~30%
15	Shenandoah National Park	🇺🇸 United States	1 of 11	~40%
	Common Garter Snake			~40%
16	Great Smoky Mountains National Park	🇺🇸 United States	1 of 11	~40%
	Common Garter Snake			~40%
17	Everglades National Park	🇺🇸 United States	2 of 11	~40%
	Ribbon Snake			~30%
	Common Garter Snake			~20%
18	Grand Teton National Park	🇺🇸 United States	2 of 11	~40%
	Western Terrestrial Garter Snake			~40%
	Common Garter Snake			~10%
19	Glacier National Park	🇺🇸 United States	2 of 11	~40%
	Western Terrestrial Garter Snake			~30%
	Common Garter Snake			~10%
20	Yosemite National Park	🇺🇸 United States	2 of 11	~30%
	Western Terrestrial Garter Snake			~20%
	Western Aquatic Garter Snake			~20%
21	Rocky Mountain National Park	🇺🇸 United States	1 of 11	~30%
	Western Terrestrial Garter Snake			~30%
22	Zion National Park	🇺🇸 United States	1 of 11	~30%
	Western Terrestrial Garter Snake			~30%
23	Yellowstone National Park	🇺🇸 United States	1 of 11	~30%
	Western Terrestrial Garter Snake			~30%
24	Reserva de la Biosfera Mariposa Monarca	🇲🇽 Mexico	1 of 11	~30%
	Mexican Highlands Gartersnake			~30%
25	Riding Mountain National Park	🇨🇦 Canada	1 of 11	~30%
	Plains Garter Snake			~30%
26	Palo Verde National Park	🇨🇷 Costa Rica	1 of 11	~20%
	Western Ribbon Snake			~20%
27	Badlands National Park	🇺🇸 United States	1 of 11	~20%
	Plains Garter Snake			~20%
28	Arrecifes de Cozumel National Park	🇲🇽 Mexico	1 of 11	~20%
	Western Ribbon Snake			~20%
29	Saguaro National Park	🇺🇸 United States	2 of 11	~20%
	Black-necked Gartersnake			~20%
	Checkered Garter Snake			~10%
30	Merritt Island National Wildlife Refuge	🇺🇸 United States	2 of 11	~20%
	Common Garter Snake			~10%
	Ribbon Snake			~10%
31	Big Bend National Park	🇺🇸 United States	2 of 11	~20%
	Black-necked Gartersnake			~10%
	Checkered Garter Snake			~10%
32	Banff National Park	🇨🇦 Canada	1 of 11	~20%
	Western Terrestrial Garter Snake			~20%
33	Guadalupe Mountains National Park	🇺🇸 United States	1 of 11	~20%
	Black-necked Gartersnake			~20%
34	Jasper National Park	🇨🇦 Canada	1 of 11	~10%
	Western Terrestrial Garter Snake			~10%
35	Congaree National Park	🇺🇸 United States	1 of 11	~10%
	Common Garter Snake			~10%
36	Cumbres de Monterrey National Park	🇲🇽 Mexico	2 of 11	~10%
	Western Ribbon Snake			~10%
	Black-necked Gartersnake			<5%
37	Grand Canyon National Park	🇺🇸 United States	1 of 11	~10%
	Western Terrestrial Garter Snake			~10%

Cities Ranked

#	City	Country	Species	Daily sighting probability
1	Denver	🇺🇸 United States	2 of 11	~40%
	Western Terrestrial Garter Snake			~30%
	Plains Garter Snake			~20%
2	Portland	🇺🇸 United States	2 of 11	~30%
	Northwestern Garter Snake			~20%
	Common Garter Snake			~10%
3	Philadelphia	🇺🇸 United States	1 of 11	~30%
	Common Garter Snake			~30%
4	Salt Lake City	🇺🇸 United States	1 of 11	~30%
	Western Terrestrial Garter Snake			~30%
5	Seattle	🇺🇸 United States	3 of 11	~30%
	Northwestern Garter Snake			~20%
	Common Garter Snake			~10%
	Western Terrestrial Garter Snake			<5%
6	Washington	🇺🇸 United States	2 of 11	~30%
	Common Garter Snake			~20%
	Ribbon Snake			~10%
7	Vancouver	🇨🇦 Canada	3 of 11	~30%
	Common Garter Snake			~20%
	Northwestern Garter Snake			~10%
	Western Terrestrial Garter Snake			<5%
8	Austin	🇺🇸 United States	3 of 11	~30%
	Western Ribbon Snake			~10%
	Checkered Garter Snake			~10%
	Black-necked Gartersnake			~10%
9	Baltimore	🇺🇸 United States	1 of 11	~30%
	Common Garter Snake			~30%
10	Detroit	🇺🇸 United States	1 of 11	~20%
	Common Garter Snake			~20%
11	Boston	🇺🇸 United States	1 of 11	~20%
	Common Garter Snake			~20%
12	Montreal	🇨🇦 Canada	1 of 11	~20%
	Common Garter Snake			~20%
13	Toronto	🇨🇦 Canada	1 of 11	~20%
	Common Garter Snake			~20%
14	Chicago	🇺🇸 United States	2 of 11	~20%
	Plains Garter Snake			~10%
	Common Garter Snake			~10%
15	Calgary	🇨🇦 Canada	2 of 11	~20%
	Western Terrestrial Garter Snake			~20%
	Common Garter Snake			<5%
16	Minneapolis [Saint Paul]	🇺🇸 United States	2 of 11	~20%
	Common Garter Snake			~20%
	Plains Garter Snake			<5%
17	Houston	🇺🇸 United States	1 of 11	~20%
	Western Ribbon Snake			~20%
18	San Antonio	🇺🇸 United States	2 of 11	~20%
	Checkered Garter Snake			~10%
	Western Ribbon Snake			<5%
19	New York City	🇺🇸 United States	1 of 11	~10%
	Common Garter Snake			~10%
20	Edmonton	🇨🇦 Canada	2 of 11	~10%
	Common Garter Snake			~10%
	Plains Garter Snake			<5%
21	Monterrey	🇲🇽 México	2 of 11	~10%
	Western Ribbon Snake			~10%
	Checkered Garter Snake			<5%
22	Sacramento	🇺🇸 United States	2 of 11	~10%
	Western Terrestrial Garter Snake			~10%
	Common Garter Snake			<5%
23	San Francisco	🇺🇸 United States	2 of 11	~10%
	Western Terrestrial Garter Snake			~10%
	Aquatic Garter Snake			<5%
24	Orlando	🇺🇸 United States	2 of 11	~10%
	Ribbon Snake			<5%
	Common Garter Snake			<5%
25	Miami	🇺🇸 United States	2 of 11	~10%
	Ribbon Snake			<5%
	Common Garter Snake			<5%
26	Dallas	🇺🇸 United States	1 of 11	~10%
	Western Ribbon Snake			~10%
27	Mexico City	🇲🇽 México	1 of 11	<5%
	Mexican Highlands Gartersnake			<5%

Zoos & Centres Where Found

#	Zoo / Centre	Country
1	Barcelona Zoo	🇪🇸 Spain	In captivity
2	North Carolina Zoo	🇺🇸 United States	In captivity
3	Ecomuseum Zoo	🇨🇦 Canada	In captivity
4	Columbus Zoo and Aquarium	🇺🇸 United States	In captivity
5	Brookfield Zoo	🇺🇸 United States	In captivity
6	Dallas Zoo	🇺🇸 United States	In captivity
7	Phoenix Zoo	🇺🇸 United States	In captivity
8	Toledo Zoo	🇺🇸 United States	In captivity
9	Silesian Zoological Garden	🇵🇱 Poland	In captivity
10	Wildlife World Zoo	🇺🇸 United States	In captivity
11	Warsaw Zoo	🇵🇱 Poland	In captivity
12	Saint Louis Zoo	🇺🇸 United States	In captivity
13	Wrocław Zoological Garden	🇵🇱 Poland	In captivity
14	Dickerson Park Zoo	🇺🇸 United States	In captivity
15	Oregon Zoo	🇺🇸 United States	In captivity
16	Houston Zoo	🇺🇸 United States	In captivity
17	Arizona-Sonora Desert Museum	🇺🇸 United States	In captivity
18	ABQ BioPark Zoo	🇺🇸 United States	In captivity
19	Philadelphia Zoo	🇺🇸 United States	In captivity
20	Riverbanks Zoo	🇺🇸 United States	In captivity
21	Aquarama Barcelona	🇪🇸 Spain	In captivity
22	Western North Carolina Nature Center	🇺🇸 United States	In captivity
23	The Living Planet Aquarium	🇺🇸 United States	In captivity
24	Trailside Museum & Zoo	🇺🇸 United States	In captivity
25	Cambridge Butterfly Conservatory	🇨🇦 Canada	In captivity
26	Grizzly & Wolf Discovery Center	🇺🇸 United States	In captivity
27	Sequoia Park Zoo	🇺🇸 United States	In captivity
28	Parque museo La Venta	🇲🇽 Mexico	In captivity
29	Africarium	🇵🇱 Poland	In captivity
30	North Carolina Aquarium at Pine Knoll Shores	🇺🇸 United States	In captivity
31	Children's Aquarium at Fair Park	🇺🇸 United States	In captivity
32	Lindsay Wildlife Experience	🇺🇸 United States	In captivity
33	herpetarium warszawskiego ZOO	🇵🇱 Poland	In captivity
34	Scales Nature Park	🇨🇦 Canada	In captivity
35	FarmHouse Fresh Animal Sanctuary	🇺🇸 United States	In captivity
36	hipopotamiarnia i akwarium morskie warszawskiego ZOO	🇵🇱 Poland	In captivity
37	Seattle Marine Aquarium	🇺🇸 United States	In captivity
38	terrarium ogrodu zoologicznego we Wrocławiu	🇵🇱 Poland	In captivity

Show all 38 Show fewer

Garter Snakes

Species in this group

Common Garter Snake

Plains Garter Snake

Western Terrestrial Garter Snake

Western Ribbon Snake

Northwestern Garter Snake

Mexican Highlands Gartersnake

Ribbon Snake

Checkered Garter Snake

Western Aquatic Garter Snake

Aquatic Garter Snake

Black-necked Gartersnake

Daily sighting probability by month

When they're spotted

Where to see Garter Snakes

Parks Ranked

Cities Ranked

Zoos & Centres Where Found