this is the shortage of swallow, swallow birds can not stand like a common bird. This is due to weak feet swallow, so unable to sustain his weight. The swallow can only stick its body by gripping the wall of the board, or rocks or beams and on other rough areas. With sharp nails, the swiftlet will stick to the fin board installed inside the building.
If we see a bird that looks like a walet perched electrically or telephone cord around the store, it certainly is not swallow birds, but the birds seriti flowers (hirunda javanica).
The bird flies like a swallow and is a colony too. The color of the fur is blackish brown with pink chin. How to eat also grab the insects that fly in the rice fields, plantations or waste bins. The bird is nesting on the porch of a convenience store with nest material from the ground. Not a bit of a guess, especially for those who still lay, think that the flower is a swallow flower.