For BPs IMHO light cycle & atmospheric pressure changes have more impact on breeding behavior than temp drops. My '08 year was 100% bred/clutch result, '09 was 80% (with a few new ones in the mix). They have constant temps, perhaps a slight night drop in the room of 2-3 F happens naturally, but the day-length is more significant. Also when fronts pass through the area, it's does seem to stimulate breeding.
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