About Hemiprocne longipennis (Rafinesque, 1802)
Adult males of Hemiprocne longipennis have a distinct dark grey throat and chest that contrasts with a white belly, and their ear coverts are dull orange-red or chestnut-colored. Adult females do not have this dull orange-red or chestnut coloration on their ear coverts. When the bird perches, its wing tips cross over the tail. Individuals of both sexes have a greenish sheen on their upper body parts. This species is found in Brunei, Indonesia, Malaysia, Myanmar, the Philippines, Singapore, and Thailand. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical mangrove forests, and subtropical or tropical moist montane forests. These birds occasionally catch insects in flight by sallying from perches. They build their nests on tree branches. Their half-saucer-shaped nest is constructed from hardened saliva mixed with feathers, mosses, and/or flakes of tree bark. Reportedly, the single egg produced is attached to the nest surface with saliva. Due to the fragile structure of the nest, it is only attached to the branch on one side. Because of this, the bird does not sit directly on the nest to incubate the egg. Similarly, parent birds are reported to brood by perching on the branch above the nest and fluffing out their breast feathers to cover the nest. Both sexes participate in incubating the egg. When shifting parental care between partners, the incoming partner perches near the currently incubating adult and carefully slides over the nest.
