By definition a xeric habitat (where the Star Tortoise is reported to come from) is a biome characterized by extremes. High and low temperature swings accompanied by wet and dry seasons.
The Star tortoise is found in heavily vegetated areas which include cultivated fields. It is also most active during the rainy season and is most scarce during the dry season. When it is active in the dry season it is during the early morning and late in the day.
Now the way I interpret this is that it shows a preference for a more humid condition in a relatively dry environment. This does not mean you keep them humid. They’ve adapted to survive in a dry environment by seeking out humid niches which I think should be provided. This is what I always recommend for all desert/xeric species. These conditions are usually not provided for such species.
I feed my guys broad leafy greens, grasses and Mazuri Tortoise diet (2x a week)
They always have water and are soaked every other day.
Hot temps are 100 and cool temps are 70
I keep them on Pine bark mulch with a hay hide at the cool end. The hay is fluffed when it gets compressed.
An easy humid hide is a Rubbermaid box with a hole cut in it and the box substrate being moist sand. Be very careful to keep it 75 or better.
And my references on the natural history info...
The Reptiles of British India, Albert Gunther, Oxford, 1864
The Book of Indian Reptiles, Bombay Natural History Society, 1983
Color Guide to the Turtles and Tortoises of the Indian Subcontinent, Indraneil Das, R & A Publishing, 1991
Turtles and Tortoises of India, WWF (NOT the world wrestling federation), 1995
Fauna of India, Zoological Survey of India, 1998
This is in addition to talking to various collectors/researchers that have found them in the wild.
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Ed
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Trying to keep the fun in Chelonian care