A Black Bulbul at Prague Zoo, Czechoslovakia. It is the white-headed morph of the nominate subspecies.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/27620892@N05">Nigel van Houten</a>
CC BY 2.0
originally posted to <b><a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a></b> as <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/27620892@N05/3341459793">Black Bulbul (Hypsipetes leucocephalus)</a>