Taxonomy
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammal
- Order
- Eulipotyphla
- Family
- Soricidae
- Genus
- Sorex
Habitat
The Mount Lyell shrew inhabits high-elevation alpine and subalpine meadows in the Sierra Nevada mountains of California, typically above 2,500 meters. It prefers moist areas with dense vegetation, such as talus slopes, stream banks, and under rocks, where it can find cover and prey. These habitats provide the cool, humid conditions essential for its survival.
Diet
The Mount Lyell shrew primarily eats insects, earthworms, and other small invertebrates like spiders and snails. It forages actively day and night, using its keen sense of smell to locate prey in leaf litter and soil. This high-metabolism animal must consume food equivalent to its body weight daily to survive.
Behavior
The Mount Lyell shrew is solitary and territorial, marking its area with scent and aggressively defending it from intruders. It is primarily nocturnal, though it may be active during the day in cooler conditions, and spends much of its time burrowing or foraging under cover. This species exhibits rapid movements and vocalizations to communicate or ward off threats.
Conservation Status
The Mount Lyell shrew is listed as Data Deficient by the IUCN, due to limited data on its population size and trends. Major threats include habitat loss from climate change and recreational activities in the Sierra Nevada.