The chest and belly areas are black and turn white as you approach the tail ... songbird that has a unique crest on its head.

The head, chest, and underbelly of the California ... and New Zealand. When it comes to birds with white heads, black-tailed gulls are quite easy to recognize. They have white bodies, wings ...

Polytypic (the 2 North American subspecies are poorly differentiated; the coastal birds ... entirely black head, mostly black back with narrow streaks, black wings with bold white wing bars ...