Yellow-billed Babbler - Turdoides affinis taprobanus, Avissawella, Sri Lanka.

They come in groups and make the loudest noise in our home-garden. They work in tandem with the squirrels. If any predators like cats or rat-snakes are around the squirrels start chirping rapidly and the babblers take flight and add to the cacophony. The Babblers are called 'Seven sisters' because they travel in groups.