This is my garter snakes (I have three) first night out here in California. I purchased them online from a reputable source where I have purchased many herps before.
My question is; I now have them in two enclosures; the large one in a screened home and the other two are housed in a 10 gallon vivarium. My question is this; should I have a heat lamp on them at night? They are outdoors right now with a warming mat under the cages. They have 3 inches of pine substrate and a cover to hide in. The nights have been in the 60's and I am wondering if the ground mat is enough for these evenings.