sentences:  The outer webs and tips of the remiges are bluish-black, making the outer sections of the upperwing appear quite uniformly dark in flight.The arguably most conspicuous feature, however, is its un-feathered blackish and orange-pinkish head, bordered by a broad yellow collar of feathers, followed by a second blackish collar.This bare, vaguely vulture-like head is the reason behind its common name.