
Photo: (c) Brodie Cass Talbott, some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Cettia castaneocoronata
Diet
Insects
Habitat
Subtropical or tropical moist lowland and moist montane forest
Range
Bangladesh, Bhutan, China, India, Laos, Myanmar, Nepal, Thailand and Vietnam
The chestnut-headed tesia is a small insectivorous songbird, formerly placed with the Old World warblers but now in the bush warbler family. It is found in Bangladesh, Bhutan, China, India, Laos, Myanmar, Nepal, Thailand and Vietnam, in subtropical or tropical moist lowland forest and moist montane forest (Wikipedia, general species account).
That short account is the only source read for the Bhutan guide. It gives no plumage, size or breeding information, so none is stated.