Warblers in general tend to be difficult to spot because they often remain hidden in the shrubbery. Many species are also difficult to distinguish because they have few or similar markings. Therefore, the song is usually be the most important factor when they are to be identified. The species within the Cisticolidae family constitute no exception. They are generally small, unassuming brown or gray birds that are found in open habitats with grass or scrub. They are insectivores that places their nests in low, dense vegetation. This particular bird is a Winding cisticola, probably of the subspecies haematocephala (which means 'blood headed'), something that I think is visible in this picture.