mack snow incubation question

[neubauer geckos]

i read somewhere that mack snow's cannot be temperature sexed.is this true?also,i have noticed that macksnows always hatch after their sibling has if the sibling is a non mack snow.what is this about?i've never hatched 2 mack snows or 2 normals,and every clutch i've had from the mack snow to tremper pairing first hatches out a normal,and then a mack snow about 12-24 hours after.why?thanks in advance!

 

[acpart]

Most of us have had no problem temperature sexing mack snows, though it seemed to be an issue a few years ago.
I have hatched 3 pairs so far this season, all 3 have been 1 mack snow and 1 non-snow. In 2 of the 3 cases, the snow hatched second, but in the latest one the snow hatched 2 days before the non-snow. I'd have to check last year's records to see what happened then.

Aliza