Bush Warblers are small, secretive birds belonging to the family Cettiidae. They are primarily found in dense undergrowth and scrub habitats across parts of Asia, particularly in regions like Japan and Southeast Asia. These birds are known for their distinctive calls, which can often be heard even if the birds themselves are not seen. These warblers have a varied diet that includes insects and berries. Their plumage is typically brown or olive, providing excellent camouflage in their natural habitats. Bush Warblers are also known for their strong territorial behavior, especially during the breeding season, when males sing to defend their territory.