The stock on the Caribbean lowlands remained in mesic environments and evolved into S. cyanosticta.
In fallen leaves and decaying wood in xeric and mesic hammock habitats (Friauf, 1953).
The mesic conditions to the north in Tabasco and Yucatn probably have restricted the movement of pygmy mice to the north.
Peromyscus maniculatus is ubiquitous, occurring in habitats ranging from mesic boreal forests to arid southwestern deserts.
However, in summer, the finding of a racer in mesic woodland is a rare event.
Relating or adapted to a moderately moist habitat. The sugar maple, white ash, and basswood are mesic plants. Compare hydric, xeric.