Short-eared Owl

The short-eared owl is a medium-sized owl, 34 to 43cm long with a wingspan of 85 to 110cm and a weight of 206 to 475g. It is a widespread bird of open country and grassland, with mottled tawny to brown plumage, a barred tail and wings, and a short, strong, hooked black bill. Its very short ear tufts are usually not visible. In flight it can look moth-like or bat-like (Wikipedia, general species account).

It is most often seen flying in early morning or late in the day as it hunts over open habitats. It has a scratchy bark-like call and a loud 'eeee-yerp' on the breeding grounds, and is silent on the wintering grounds. Four to seven white eggs are typical, up to a dozen in years when voles are abundant. It is partially migratory, moving south in winter. The sources read do not describe it in Bhutan.