Locustella is a genus of small, secretive birds commonly known as grass warblers. They are primarily found in wetlands, grasslands, and reed beds across Europe, Asia, and Africa. These birds are known for their distinctive songs and are often difficult to spot due to their camouflaged plumage. The genus includes several species, such as the Savi's Warbler and the Marsh Warbler. Locustella birds typically have a slender body, long legs, and a short tail. They feed mainly on insects and other invertebrates, making them important for controlling pest populations in their habitats.