Square-tailed Bulbul vs Red-vented Bulbul

The Square-tailed Bulbul and Red-vented Bulbul can be distinguished by their tail shape and vent coloration. The Square-tailed Bulbul has a distinct square-shaped tail, while the Red-vented Bulbul features a rounded tail with a conspicuous red vent.

Focus on the tail shape and vent color: the Square-tailed Bulbul has a square tail and lacks the red vent of the Red-vented Bulbul. Use binoculars to check these features in good light.

The Red-vented Bulbul is notable for its red vent, which is absent in the Square-tailed Bulbul. Additionally, the Square-tailed Bulbul has a more uniform dark plumage, whereas the Red-vented Bulbul may show some contrast with its darker head and lighter body.