Your tortoise can't tell you the basking spot has drifted cool, that the UVB tube has aged out, or that a run of refusals isn't just a seasonal slow-down. baskr watches the pattern across your logs, temperature, humidity, weight, diet and brumation, and shows you what needs attention before it becomes a problem.
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Russian Tortoise
Humidity running high
68% average this week vs a drier 40–50%. Improve ventilation to protect the shell.
Basking spot
32–35°C · 90–95°F
Cool side
21–24°C · 70–75°F
Humidity
40–50%
Ideal ranges for Testudo horsfieldii, the same targets baskr scores your logs against.
Basking and warm figures are surface temperatures at the spot; cool and ambient are air. Measure with a probe or infrared thermometer at the animal's height.
Diurnal
Active by day
Arid steppe of Central Asia
Wild climate. Harsh dry steppe; hot summers, freezing winters.
Why the care is what it is. This is why it is a hardy digger on a dry weed diet that hibernates, with a 32 to 35°C basking spot and strong UVB.
Logging is the input. The product is spotting when a single off reading becomes a pattern worth acting on.
32–35°C (90–95°F) over the basking spot
A few degrees cool for a week and appetite, digestion and activity quietly drop.
A cool end of 21–24°C (70–75°F)
No real gradient leaves a tortoise unable to regulate, and skews its basking behaviour.
40–50% for an arid species, with a humid hide
Persistently damp risks shell rot and respiratory infection; bone-dry with no humid hide risks dehydration and pyramiding.
Slow, steady, smooth growth, not rapid
A downward trend, or sudden fast lumpy growth, is an early red flag worth catching.
High-fibre weeds and greens, offered daily
A run of refusals that isn't seasonal is worth a closer look at warmth, hydration and UVB.
A gradual, seasonal slow-down as things cool
baskr separates a normal pre-brumation wind-down from an off-season decline you should act on.
Safe to include
Avoid
Aim for a varied, weed-led grazing mix rather than one salad crop. Plant hardy edible cover they can browse, rinse anything sprayed, and skip anything you can't confirm is non-toxic.
Staples
Occasional / treats
Never feed
Supplements. Dust food lightly with calcium (with occasional D3 if UVB is marginal), and offer a cuttlefish bone to graze. Keep the diet high-fibre, low-protein, low-sugar.
Good to know. Russian tortoises are strict herbivores, never feed animal protein, and treat fruit as rare or not at all. A dry-climate species does best on high-fibre weeds and greens, not sweet or watery foods.
The right kind of kit, pick brands you trust.
UVB lighting
A high-output T5 HO UVB tube (~10–12%, Ferguson zone 3–4) over the basking area, at the maker's stated height. Replace every 12 months even if it still lights, UVB fades long before the tube dies.
Basking heat
A white basking (halogen) lamp on a thermostat to hold 32–35°C at the basking spot; natural sunlight outdoors is even better in warm weather.
Thermostat
Non-negotiable, it controls the heat source so the enclosure can't overheat.
Thermometer + hygrometer
Digital, with a probe read at basking height, not stick-on dials. Check both ends of the gradient.
Enclosure & outdoor pen
A large, escape-proof tortoise table or vivarium with deep substrate indoors, plus a secure, dig-proof outdoor pen for grazing and real sun whenever weather allows.
Grounded in your own logs and the ideal ranges above, plain language, never a diagnosis.
Basking spot read 28°C for 5 days, below the 32–35°C your Russian tortoise needs to digest and stay active. Check the bulb height or thermostat.
Bo has refused 4 feeds in a row and it's mid-summer, not brumation season. Keep an eye on weight, warmth and hydration.
Humidity has averaged 68% this week, damp for an arid species. Improve ventilation to reduce shell-rot and respiratory risk.
Enter your own readings for an instant care score, the same check baskr runs for you every day.
Enter a reading or two above to see Russian Tortoise's care score.
A quick guide, not a diagnosis. Ideal ranges vary with age, morph and setup, and individual animals differ, so confirm anything critical with an experienced keeper or a reptile vet.
Aim for roughly 32–35°C (90–95°F) at the basking spot, with a cooler end around 21–24°C (70–75°F) so it can thermoregulate. baskr checks the temperatures you log against this range and flags a sustained drift, but always verify with a good thermometer at basking height and a current care sheet.
A high-fibre, herbivorous diet of wild weeds and leafy greens, dandelion, plantain, clover, sowthistle, chicory, plus edible flowers as extras. No animal protein, and fruit only rarely if at all. baskr tracks what you log so a fruit-heavy or repetitive diet stands out early.
Burrowing is completely natural, Russians are dedicated diggers, so give deep substrate to burrow into. Constant wall-pacing can also mean the enclosure is too small or the gradient is off. baskr helps you spot whether activity is normal seasonal behaviour or a sign to review the setup.
Healthy adults naturally brumate in cooler months, but only tortoises in good weight and health should, with proper temperature control. baskr helps you separate a normal seasonal wind-down from an off-season decline; before brumating, confirm your animal is fit with an exotics vet. baskr is a husbandry assistant, not a diagnosis.
Log your russian tortoise's care in seconds and baskr does the watching. Free for your first 3 animals.
Start freeLast reviewed August 2026. General husbandry guidance, not veterinary advice, and ranges vary with age, morph, subspecies and setup. Confirm anything critical with an experienced keeper or an exotics vet.