The genus Sorex comprises some of the most voracious insectivores among mammals. Their diets include a wide array of invertebrates such as insects, larvae, earthworms, and even small mollusks. Sorex shrews possess a high metabolic rate, requiring them to consume up to twice their body weight in food daily, which drives their constant foraging behavior.
- Sorex shrews are obligate insectivores, feeding primarily on invertebrates.
- Their diet includes adult insects, larvae, earthworms, and small aquatic invertebrates.
- Due to their high metabolic rates, they must eat almost continuously.
- Some species also consume fungi and plant material, but invertebrates remain the core diet.
- Their sharp, spike-like teeth are adapted to grasp and shred prey.
Source Material
Author: Encyclopedia of Life
Document: *Sorex* - Encyclopedia of Life
Date Published: 2024
Exercise: Describe how the high metabolic rate of Sorex shrews influences their daily food intake and foraging behavior.
Conclusion
Sorex shrews are remarkable for their intense insectivory and the energetic demands of their tiny bodies.
- Diets focused on invertebrates, including insects, larvae, and worms
- Exceptional metabolic demands drive nearly constant feeding
- Tooth morphology specialized for a carnivorous diet