Influence of the semiaquatic habit in determining burrow structure of the star-nosed mole (Condylura cristata)

Abstract

Condylura cristata is unique from most talpids in being semiaquatic. This report investigates the effect of a water habitat on burrow structure and is the first description of completely excavated burrow systems of the star-nosed mole, representing reedbed and lakeside habitats. Major features of the burrow structure included lack of surface ridges and mounds, unplugged burrows, along the edge of water, lack of steep vertical shafts to lower levels, deep tunnels not confined to particular areas of burrow system, a single active nest chamber containing dead leaves and freshly chewed pieces of Typha, and absence of special chambers for food storage or defecation. In comparing the influence of aquatic habits on structure of the burrow with terrestrial (Scalopus aquaticus) and aquatic (Desmana moschata) species of Talpidae, the semiaquatic Condylura is intermediate in position.