Dancing Hoskuld
Deity
It seems that the problem is not caused by your recent change. I reverted CvMapGeneratorUtil.py to Rev. 7226, just previous revision of your change.
But kangaroos and llamas were still not placed. I tried other mapscripts and the results were same.
EDIT: I updated CvMapGeneratorUtil.py again and same result.
Turns out I forgot to remove some comments so my changes to the code don't do anything anyway. I am getting both llamas and kangaroos on huge tectonics map but only one of each so it may be that their probability is too low. I'll have a look.