Hello schmiggle, in theory this should be a fairly simple question but in practice I think it is quite complex. Certainly based on my experience of fastuosa, terrestris and giglioli it depends on the external temperature. Colder they become less active, warmer more active etc. Being poikilotherms means everything is tied into this really I reckon. Mine stop feeding at about 7C and are very active upto about 20C. My adults are subjected to normal UK weather (south east) which I believe have given me such success with these animals (They are brought into a frost proof area during cold nights). Youngsters however are kept in my house until they are about 2 or 3 year old. One must consider rates or digestion too. When it's cold I feed very little as I don't want the meal sitting in the salamanders' gut too long. I feed the small white slugs, chopped earth worms, crickets, meal worm, caterpillars and tend to let them eat all they will over night and then leave it at that for three days before feeding again. Having said that, if I see them out and about early in the evening I take this to mean theyt are hungry and so feed them again. With time you get to read their behaviour.