Warbler / Weidenlaubsänger
They are mostly brownish or dull greenish in color. They tend to be more easily heard than seen. The species are of various sizes, often green-plumaged above and yellow below, or more subdued with greyish-green to greyish-brown colours, varying little or not at all with the seasons. Many species are more easily identified by their distinctive songs than their dull plumage.