The smallest mammal in the world is the SHREW. It is a small, mouse-like mammal that is found in many parts of the world. Shrews are insectivores and feed on insects, worms, and other small invertebrates. They have long snouts and small eyes, and their fur is usually gray or brown. They are active during the day and night and can be found in forests, grasslands, and even urban areas. Shrews are important predators in their ecosystems, helping to control insect populations.