Just received photo of Himalayan Swiftlet TJ Marsden and I saw at Tung Ping Chau - over the small former reservoir - on 5 April.
Perhaps interesting as v pale below; at the time, I thought paleness of lower belly/vent recalled Glossy Swiftlet of places further south (but wasn't figuring there's chance of this species!).
Hopefully I'll receive one or two more shots of this bird - also taken by TJ Marsden.