Taliabu Bush Warbler Locustella portenta

A recently described species endemic to the declining montane forests of Taliabu. Dark, sparrow-sized warbler with a scruffy-looking, graduated tail. Dark above, with a pale eyebrow and throat; very similar in appearance to Seram, Sulawesi, and Buru Bush Warblers, all formerly grouped under “Chestnut-backed Bush Warbler.” Secretive and skulky, moving about stealthily in dense vegetation on or near the ground. Darker above and dingier below than migrant grasshopper warblers such as Gray’s and Middendorff’s, and with a prominent white throat. Song is a series of extremely high, thin notes: “tzi’eeee, tzi’eeee, tzi’eeee.”