A flock of some 28 American White Pelicans way out off Nisqually Reach.
I noticed several had black caps. One had black on almost its whole head
and neck. I did a brief online search found nothing like that. Some
Brown Pelicans are some what dark on the back of the neck.   ????
Juveniles? Hybrids ?  Photos on my Fliker page
https://www.flickr.com/photos/jirvingw/42960088542/in/dateposted-public/ .

John