Scientific Name: Phylloscopus borealoides
Malay Name: Cekup-Daun Kaki Pudar Jepun
Chinese Name: 库页岛柳莺
Found from the Japanese Archipelago, Sakhalin to Kuril islands and winters to Southeast Asia
Size: 11.5 cm
Adult resembles Arctic Warbler but has dark greyish crown contrasting with olive-greenish mantle, warmish olive-brown rump and pale greyish pink legs and feet. Indistinguishable from the very similar looking Pale-legged Leaf Warbler visually (or oftentimes even in hand), and in the field it can only be told apart by its call (~5Khz instead of ~6Khz) or characteristic song.
Behaviour/Ecology: Usually forages for insects on the forest floor, sometimes climbing up low shrubs and vines to glean prey. May also be found in the mid-storey to canopy levels.
Local Status: Very rare migrant
Conservation Status: Least Concern (BirdLife International 2016)
Past records, bar chart (see more bar charts):
Conservation Status: IUCN Red List Page
Photos: Oriental Bird Images
Sound Recordings: xeno-canto Link
Wikipedia Entry: Wikipedia Link
eBird Species page: eBird (Sakhalin Leaf Warbler)
BirdLife International. (2016). Phylloscopus borealoides. The IUCN Red List of Threatened Species 2016. https://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T22715329A94448458.en. Accessed on 19 December 2021
Hungnon, C., Khudamrongsawat, J., Manawattana, S., Pierce, A. J., & Round, P. D. (2017). Distinguishing between Sakhalin Leaf Warbler Phylloscopus borealoides and Pale-legged Leaf Warbler P. tenellipes on call. Forktail, 33, 77-80.
Robson, C. (2014). Field guide to the birds of South-East Asia (Second Edition). Bloomsbury Publishing, London.
Yap, F., Yong, D. L., Low, B. W., Lim, K. K., Foley, C., Cros, E., & Rheindt, F. E. (2014). First wintering record of the Sakhalin Leaf Warbler Phylloscopus borealoides in South-East Asia, with notes on vocalisations. BirdingASIA, 21, 76–81.