The American pygmy shrew is one of the smallest mammals in North America, measuring about 3 to 4 inches long, including its tail. It has a slender body, short legs, and a pointed snout, which helps it hunt for insects and other small invertebrates in its habitat. This shrew is typically found in forests, grasslands, and wetlands, where it prefers moist environments. It is known for its high metabolism, requiring it to eat frequently to sustain its energy levels. The American pygmy shrew plays an important role in the ecosystem by controlling insect populations.