The evolution of eimer's organs in Talpids appear to be correlated with habitat preference. A gradient from wet to dry soils exists among the 3 North American species common with the Eastern mole preparing it drier soils, star nosed moles living in very wet habitats, and hairy tailed moles preferring intermediate soil types. Eimer's organs in Eastern moles are degenerates, probably because of the thicker skin necessary to combat the considerable wear and tear of burrowing through dry, often sandy soils.

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