Simply (the articles I'm writing about the bitaeniatus and other montanes go into this in greater detail):
June - August: One 15 minute misting session after true sun rise and before lights on. 0745-0800hrs. This simulates the morning dew. Humidifier on only at night (12 hours). Daily to every other day feedings.
September - December: One 15 minute misting session after true sun rise and before lights on. 0745-0800hrs. This simulates the morning dew. Add a mist session in afternoon to simulate late day thunder/rain showers. 1645-1700hrs. Increase humidifier length to 18 hours. Every other day to feedings. Most keepers notice a natural decrease in appetite in the late fall.
January - May: One 15 minute misting session after true sun rise and before lights on. 0745-0800hrs. This simulates the morning dew. A mist session at midday 1200-1205. A mist session in afternoon to simulate late day thunder/rain showers. 1645-1700hrs. Humidifier on 24/7. Daily feedings. Most keepers notice a natural increase in appetite come spring. This extra water, humidity and available food cues my seasonal montanes to breed.
My lights, which are on timers, get adjusted to the seasonal light changes as they occur; so my on/off times change almost monthly. Maybe bi-monthly? I also make slight adjustments to humidifier and mist system times so the changes I said above aren't quite so jarring to my critters.
Your calyptratus does not have quite the extreme seasons as my montanes, but there are warm/dry and cool/wet cycles that happen in Yemen that coincide with our North American cycles. I wouldn't necessarily use the same regime as I do, but you said it yourself in that you've seen the naturally occurring cycles (appetite, sleep for instance) so why not adjust for things that are naturally hardwired in our animals? I let them tell me what they want or need and then supply it for them. Now I sound like the bloody cham whisperer. :/
As for the pardalis... which locale? I think the west coast gets more rain than the east in general (someone correct me if I'm wrong!) so does anyone account for that - or is that just too anal-retentive? Maybe we would see more successes in breeding some of the locales (i.e. Nosy Be, Ankaramy) if we paid more attention to that?!?! Seriously though, Madagascar's seasons are opposite to us, but again having the natural light and temperature cues of the northern hemisphere, they naturally switch over to the cycle set above.
Don't get me started on the need for high humidity for ALL chameleons.
Cheers,
t
Post scriptum: What do you mean; an African or European Swallow?