Manchurian Bush-warbler – nomenclature issues

Saw this Manchurian Bush-Warbler (Horornis borealis) in the undergrowth and a pile of stacked sticks at close range but hard to get a clear image of this skulker. Was feeding actively while we watched.

Nomenclature issues:

a. Manchurian Bush-warbler Horornis borealis is used by:

1. Clements Checklist of the Birds of the World 2018
2. The Howard & Moore Complete Checklist of the Birds of the World 4th Edition
3. eBird
4. Lepage, D. 2019. Checklist of the birds of Taiwan. Avibase, the world bird database
5. International Ornithologists’ Union (IOC) World Bird List 2018, version 8.2 – but states “Unsettled taxonomy” “New genetic data support original split of Manchurian Bush Warbler, including canturians and borealis from H. diphone”

1. Oriental Bird Images place it under Oriental Bush Warbler Cettia diphone
2. Handbook of the Birds of the World Alive (2019) uses Korean Bush-warbler Horornis canturians boreali

Amar-Singh HSS (Dato’ Dr)

Ipoh, Perak, Malaysia

Location: Guguan, Taichung City County, Taiwan

Habitat: Recreational area near forest reserve

Date: 16th January 2019

Equipment: Nikon D500 SLR with Tamron SP 150-600mm f/5-6.3 Di VC USD, handheld with Rode VideoMic Pro Plus Shotgun Microphone