Square-tailed Bulbul

The square-tailed bulbul, also called the south Indian black bulbul, is a dark bulbul that was formerly treated as a subspecies of the black bulbul. It lacks that species' black streak behind the eye and on the ear coverts. Two subspecies are recognised, the Sri Lankan one having a heavier bill than the Indian one (Wikipedia, general species account).

In southern India nesting begins in February and peaks in May; the eggs hatch after 12–13 days and the chicks fledge after 11 or 12 days. Nest predators include birds of prey and snakes such as the black-winged kite and Oriental ratsnake, and adults are taken by crested goshawks. Populations move in response to the monsoon. SoIB 2023 treats it as endemic to the Western Ghats and Sri Lanka and a local migrant, estimates a long-term decline of about 69%, and rates it a Moderate conservation priority (Wikipedia, general species account; SoIB 2023).