 Also, warmer temperatures in their habitat have been shown to cause greater mortality rates among the lizards, posing another potential threat to the species.Higher temperatures have been associated with higher mortality rates for "X. grandis".In the 2003-2004 wet season of Southern Mexico and Guatemala (the habitat regions of the species), the average temperature was 24.3 C. That temperature was in the top 12% of highest recorded temperatures in the past 34 years of record keeping.