
Photo: Tim · CC BY 4.0 (May be cropped or resized)
Ardeola grayii
Habitat
Nests in large leafy trees, most at about 9–10m
Clutch size
3–5 eggs
Incubation period
18–24 days, hatching asynchronously
The Indian pond heron builds most nests at a height of about 9 to 10m in large leafy trees. Three to five eggs are laid, and they hatch asynchronously, taking 18 to 24 days (Wikipedia, general species account).
That is all the source read for the Bhutan guide gives. No plumage, size, range or diet information was found, so none is stated, and its occurrence in Bhutan is flagged for checking.