
Photo: Mickey Wu · CC BY 4.0 (May be cropped or resized)
Hydrophasianus chirurgus
Weight
Males 120–140g; females 190–200g (Philippines dataset)
The pheasant-tailed jacana is a water bird in which females are larger than males and are polyandrous, laying several clutches that are raised by different males in their harem. One female may lay up to ten clutches in a single season. In a dataset from the Philippines males weighed 120 to 140g and females 190 to 200g (Wikipedia, general species account).
The source read for the Bhutan guide gives these breeding details and weights only. No plumage, range, habitat or diet information was found, so none is stated, and its occurrence in Bhutan is flagged for checking.