Motacilla tschutschensis, Gmelin, 1789

Bishop, K. David, 2023, The avifauna of Biak Island, Papua, Indonesia with comments on status, conservation, natural history and taxonomy, Bulletin of the British Ornithologists’ Club 143 (1), pp. 3-62 : 54

*EASTERN YELLOW WAGTAIL Motacilla tschutschensis

Range Subspecies? Biak.

Status Palearctic migrant. Uncommon but regular Palearctic migrant to New Guinea (Beehler & Pratt 2016) . 7 October 1997: SvB saw one at Wadibu, Biak, on a substrate of pebbles and dry sand. It had uniform dirty greyish-yellow underparts, with the breast-sides washed grey, a pronounced pale supercilium, uniform greyish-brown upperparts, wings with several fine pale bars; legs greyish brown; bill with a pinkish gape (?); white outer tail feathers. It pumped its tail and uttered a single tsreep in flight. A second bird was seen a short while later in the same area.