
Photo: Mario Bassini · CC BY 4.0 (May be cropped or resized)
Oenanthe oenanthe
Clutch size
4–7 smooth but not glossy eggs, laid at daily intervals
Incubation period
About 13 days
Size
14.5–16cm
Wingspan
26–32cm
Weight
17–30g
The northern wheatear is larger than the European robin, at 14.5 to 16cm long, with a wingspan of 26 to 32cm and a weight of 17 to 30g. The female lays eggs at daily intervals (Wikipedia, general species account).
The clutch is four to seven smooth but not glossy eggs, around 21.0 by 15.8mm and averaging 2.83g, and they hatch after approximately 13 days. The source read gives no range, habitat or diet information, and does not name Bhutan, so none is stated.