Oh by the way, all Candoia can be sexed by the presence or lack of spurs. It is very easy: Males have them, females don't.

Spurs on Candoia are pretty prominent too, so there should not be any guesswork. It will either have them or not.

Check the bible by Conway, great info on Candoia:

http://www.kingsnake.com/candoia/
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John R. Stebbins
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1.1 Candoia bibroni australis
0.2 Candoia carinata carinata
2.0 elaphe guttata guttata