Black-capped bulbul
The black-capped bulbul, or black-headed yellow bulbul, is a member of the bulbul family of passerine birds. It is endemic to Sri Lanka.
Taxonomy
The black-capped bulbul was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with the flycatchers in the genus Muscicapa and coined the binomial name Muscicapa melanictera. The specific epithet combines the Ancient Greek melas meaning "black" with ikteros meaning "jaundice-yellow". Gmelin based his description on the "yellow-breasted fly-catcher" from Sri Lanka that had been described and illustrated in 1776 by the English naturalist Peter Brown.The black-capped bulbul was formerly placed in the genus Pycnonotus. A molecular phylogenetic study of the bulbul family published in 2017 found that Pycnonotus was polyphyletic. In the revision to the generic classification the black-capped bulbul and four other species were moved from Pycnonotus to Rubigula.
Until 2008, the black-capped bulbul was considered as conspecific with the black-crested, ruby-throated, flame-throated and Bornean bulbuls. Some authorities have considered the ruby-throated, flame-throated and Bornean bulbuls to be subspecies of the black-capped bulbul.