Hi David
I'm not looking for "swell ups" - except those clearly visible a short time before deposition of the eggs
Actually, mating and pre mating behaviour in Dendraspis polylepis can hardly be overlooked (and overheared) - it's one of the "heaviest" pre mating behaviour in snakes at all.
The male rocks the females body and tail periodically like hell - all the adjacent cages vibrate and i'm able to hear that one floor higher.
Copulation usually lasts for several hours - the established recordof my breeding pair here is measured 18 (!!) hours, they usually do not like "quickies".
Due to my experiences, the chances for copulations without this well pronounced pre mating behaviour are poor.
I have a short period of slightly lesser temperatures (October, November). End of november, temperatures are increased again and (almost) daily, short showers are given.
This seems to work pretty good here - no guarantee it will work at your place, but it's worth a try.
Best regards
Peter
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Cobras - breathtaking beauties!