Eve ....thank you so much for your reply. After reading up on brumation I am sure that is what has occured. I am totally familiar with hibernation but, since there are no lizards naturally inhabiting my state, I had not heard of brumation.

In any event, the basking spot has remained between 95-100 while nightime temps are now 70-72 whereas they had been closer to 75 in the summer. Daylight hours, of course, have diminished (though I do have a uvb lamp on 12 hours/day) so that is likely the trigger. They do not appear to have lost any weight, and respiration is normal.

The only remaining puzzle is "why didn't they do this last year?" Thanks again.

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