
Photo: (c) Rejoice Gassah, some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Phylloscopus reguloides
Habitat
Subtropical or tropical moist montane forests
Range
Mainly Southeast Asia, southern China and along the Himalayas to northern Pakistan
Blyth's leaf warbler is found mainly in Southeast Asia, southern China and along the Himalayas to northern Pakistan. Its natural habitat is subtropical or tropical moist montane forest (Wikipedia, general species account).
It has a highly complex birdsong, which takes into account the number of distinct notes, a consequence of increased variation between song types. The source read gives no plumage, size, diet or breeding information, and does not name Bhutan, so none is stated.