Grey-rumped Treeswift

Grey-rumped Treeswift is a bird of the treeswift family, which has four living species. When perched, the wing tips cross over the tail. Adult males have a distinct dark grey throat and chest contrasting with a white belly and dull orange-red or chestnut ear coverts, which females lack (Wikipedia, general species account). Like other treeswifts it is closely related to true swifts. unlike them it is arboreal, often perched on trees, high-tension power lines and pylons. (Wikipedia, general species account).

The half-saucer nest is made of hardened saliva mixed with feathers, moss or flakes of bark and is built on a tree branch. The single egg is reportedly attached to the nest with saliva, so the bird does not sit directly on the nest. This species is commonly found in peninsular Malaysia. Its recorded distribution includes Brunei, Indonesia, Malaysia, Myanmar, the Philippines, Singapore, and Thailand. The half-saucer-shaped nest is made from hardened saliva interspersed with feathers, mosses, and/or flakes of tree bark. (Wikipedia, general species account).