This shrew lives in the highlands of northern Ecuador. Its long fur is gray-brown, with a stronger yellowish color around the throat. The original description identifies grassy páramo as its main recorded habitat.
Specimens in the original description had long gray-brown fur with a stronger yellowish hue mainly at the throat.
Cryptotis niausa inhabits the Andes of northern Ecuador and southwestern Colombia. Its recorded environments include high-elevation grasslands and adjoining mountain forest.
The 2021 paper reporting its first Colombian record examined one female found dead on 13 March 2020. It was discovered on a hiking trail near La Bolsa Lake in Nariño, at 3,437 metres elevation. Researchers examined its body, skull and dental characters.
They also sequenced part of its DNA from liver tissue and compared it with Ecuadorian sequences. Morphology and the genetic analysis supported identification as the same species. The record extended the known distribution 28.3 kilometres north of the nearest Ecuadorian record. One specimen revealed that this highland mammal also lived across the border.
An extinction-risk assessment has not been added yet.
The 2021 study calls for fieldwork to establish the northern and southern limits of this species’ distribution. It also identifies gaps in information on population change and severe habitat fragmentation needed for conservation assessment. Establishing where populations occur and how they change in Ecuador and Colombia is therefore a research priority.