Black-chinned Yuhina

The black-chinned yuhina (Yuhina nigrimenta) is a bird species in the white-eye family Zosteropidae. It is found in the Indian subcontinent from the Himalayas eastwards to contiguous hilly regions of Southeast Asia. The species ranges across Bangladesh, Bhutan, Cambodia, India, Laos, Myanmar, Nepal, Tibet and Thailand. Its natural habitats are subtropical or tropical moist lowland forests, as well as subtropical or tropical moist montane forests. (Wikipedia, general species account).

The accessible general account establishes the species identity, distribution and the natural-history points stated above. Behaviour, diet and breeding can vary geographically, and the available source does not support adding precise Vietnam-specific measurements or nesting dates. This profile therefore retains only species-wide information that can be stated defensibly, rather than filling gaps with unsupported local claims (Wikipedia, general species account).