At a glance the quick version
Typical captive range; up to 20 years recorded, and ReptiFiles notes 10+ years with good care.
Looks how to spot one
Keeled scales; slim build
A slim, lively snake with keeled scales. Most show three pale stripes running down a darker body, though some populations swap the stripes for a checkered pattern of spots and a few are entirely black.21
Personality what they are like
Busy and alert. Most adults become comfortable with handling when it is kept short and calm, though individuals differ. A startled snake may release a strong-smelling musk.31
Daily activity how busy a day looks
Diurnal and energetic, often most active in the morning and late afternoon. Basking is an important part of its day.12
Grooming and care the hands-on bits
Provide a basking spot of about 29-32 C, a cool side of 23-27 C and nights of 18-24 C, with humidity around 35-60 percent. UVB lighting and a 14-hour summer / 10-hour winter light cycle are recommended. Handle weekly to daily in short sessions.3
Home where they are happiest
At least about 120 x 60 x 60 cm (48 x 24 x 24 in) for one adult, and bigger is better. Wild garter snakes favour meadows, marshes, woodland edges and other spots near water.32
Food basics what goes in the bowl
Carnivore that eats whole prey. Wild snakes favour earthworms and amphibians but also take fish, slugs and other small animals. In captivity offer a varied menu such as earthworms, suitable fish, mice and quail eggs: adults every 4-7 days, juveniles every 3-5 days.13
Company who they like around
Can be kept alone or in groups, and young snakes may be calmer in company. Different garter snake species should not share a home.3
The story where it all began
Carl Linnaeus described the common garter snake in 1758 as Coluber sirtalis. It is now split into about twelve subspecies across North America and is one of the most widespread snakes on the continent.1
Fun facts for the dinner table
- 1
Garter snakes give birth to live young, usually 10 to 40 at a time, with litters of up to 80 recorded.2
- 2
In cold regions they spend winter gathered together in shared dens to conserve warmth.2
- 3
They can eat toads and even rough-skinned newts that would be toxic to many other predators.1
- 4
In spring a single female may be surrounded by ten or more males in a so-called mating ball.1
- 5
Massachusetts named it the official state reptile in 2007.1
Recognised by the official bits
- IUCN Red List
- Least Concern1
- Commonwealth of Massachusetts
- Official state reptile since 3 January 20071
The care rhythm Furry Diary remembers it for you
A typical home-care rhythm for a Garter Snake. It is our own starting plan, not a vet's advice, and you can change every line in the app.
- Fresh waterevery day
- Temperature checkCheck the warm and cool endsevery day
- Humidity checkevery 2 days
- Spot cleanevery 2 days
- FeedingHow often depends on species, age and sizevaries
- Shed checkNote each shed in the diary; a complete shed is a good signvaries
- Weigh inevery month
- Full cleanevery month
- Vet check-upFind a vet who sees exotic petsevery year
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Where this comes from
Every breed page shows where each fact comes from. If we got something wrong, sorry, we are pet people, not a science magazine. Tell us at [email protected] and we will fix it.
- Common garter snake - Wikipedia en.wikipedia.orgused for names, range, size, colour, diet, history, facts
- Thamnophis sirtalis - Animal Diversity Web animaldiversity.orgused for range, length, mass, lifespan, behaviour, reproduction
- Garter Snake Care Sheet - ReptiFiles reptifiles.comused for enclosure, temperatures, humidity, lighting, diet, social, handling
Checked 2026-09-30. Text is written in our own words from these sources.