Medium-sized rallid. Adults have a white face, neck, and belly, with a grayish upperpart and a red base to the upper mandible. Juvenile has black plumage.
HKBWS (2022). Field Guide to the Birds of Hong Kong and South China (9th ed.). Hong Kong: HKBWS.
Carey, G. J. and Pang C. C. (2023). White-breasted Waterhen Amaurornis phoenicurus, version 1.0. In The Avifauna of Hong Kong (G. J. Carey, Editor). Hong Kong Bird Watching Society, Hong Kong, China. https://cms.hkbws.org.hk/avifauna/species/0060/008700
