You wouldn't call this glowing before pre-ov shed? I'm not arguing with you, snakes never go by the book, but in my experience I've noticed them glowing for several months.
(I keep a blog of sorts on my site so I can keep track of dates)
February, I have pictures of her head looking like this in January too
http://i157.photobucket.com/albums/t...ing/007-11.jpg
http://i157.photobucket.com/albums/t...ding/019-1.jpg
May, that means she was glowing for 1-2 months before she ovulated
http://i157.photobucket.com/albums/t...ding/002-1.jpg
Same girl another year
January
http://i157.photobucket.com/albums/t...Isis/003-3.jpg
May
http://i157.photobucket.com/albums/t...Isis/011-9.jpg
January
http://i157.photobucket.com/albums/t...ps1a1ba3d3.jpg
April, roughly 2 months of glowing before ovulation
http://i157.photobucket.com/albums/t...ps98d7487e.jpg
Another year with the girl above, I call the neck glow the beginning of glowing, so far I've had 100% accuracy on whether or not they will lay if they have that neck glow. Granted I've only had 7 clutches, but still...
January
http://i157.photobucket.com/albums/t...eeding/053.jpg
April, ovulation
http://i157.photobucket.com/albums/t...ding/035-1.jpg
And this girl
January
http://i157.photobucket.com/albums/t...eeding/039.jpg
May, ovulation
http://i157.photobucket.com/albums/t...ing/mom009.jpg
And that mojave girl has shed once in between glowing like crazy
Feb 3rd
http://i157.photobucket.com/albums/t...psa2803745.jpg
March (a few days ago), she shed last week, I really don't think she has ovulated yet because she's still breeding.
http://i157.photobucket.com/albums/t...ps7cd36be8.jpg