Yellow-bellied Tanager (Tangara xanthogastra) is similar to three other species of Tangara: Speckled Tanager, Spotted Tanager, and Dotted Tanager. All are small, mostly green Tangara, and several of these species also are spotted with black.
The Red-vented Bulbul (Pycnonotus cafer) is a member of the bulbul family of passerines. It is resident breeder across the Indian Subcontinent, including Sri Lanka extending east to Burma and parts of Tibet.
Red-Billed Leiothrix (by TerribleTer) ----- The red-billed leiothrix is a member of the Leiothrichidae family (LAUGHING THRUSHES), and is native to the Indian subcontinent. Adults have bright red bills and a dull yellow ring around their eyes.
Gold-ringed tanager (Bangsia aureocincta) is a species of bird in the family Thraupidae. It is endemic to Colombia. Its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss.