The species lives in the sub-leaf stratum of the forest floor and primarily feeds on insects. The specific epithet is derived from the type locality, Narcondam Island.[1] It is one of two endemic fauna of the island, the other being the Narcondam hornbill (Rhyticeros narcondami). The species displays significant genetic divergence from mainland Asian species such as the Chinese white-toothed shrew (Crocidura rapax), and even greater divergence from other endemic Crocidura species from the Andaman-Nicobar islands, such as the Andaman shrew (Crocidura andamanensis) and Nicobar shrew (Crocidura nicobarica); this indicates that C. narcondamica and the other endemic shrews of the Andamans and Nicobars are likely not the results of a single adaptive radiation as they initially appear, but rather represent at least three independent colonization events from the Asian mainland.[1]
