ハシボソキイロムシクイ Calamonastides gracilirostris

Mid-sized, long-billed warbler, with rich yellow underparts and an olive-green back. The underparts often show an orange tint. Found in papyrus swamp. Very localized and poorly known species. The song consists of simple repeated phrases and is easily missed. Other yellow-warblers are similar but have different songs, lack orange tones to the underparts, and are found in different habitats.