Thanks to those who responded so rapidly, consensus being Glaucous based on size. I forgot to mention that it was around the same size as nearby Herrings, maybe slightly larger.
From: <carolinabirds-request...> [mailto:<carolinabirds-request...>] On Behalf Of Matt Spangler
Sent: Friday, March 03, 2017 7:02 PM
Subject: Help--possible Glaucous (maybe Iceland) at Wrightsville Beach Mason Inlet
Today (Friday) between 1:30 and 3 pm an apparent immature Glaucous or maybe Iceland Gull was hanging out at the north end of Wrightsville Beach (Mason Inlet) with other gulls and terns, providing great looks. I would appreciate help confirming the species-photos are in the ebird checklist linked below. The bird had entirely white plumage and a two-toned bill that looked more like 1cy Glaucous than Iceland, but I am admittedly not familiar with either.