Well nerds. I was shocked last night to learn an Iceland Gull was reported near Sausalito, joining the thousands of other gulls feasting on herring and their reproductive products. After a job interview this morning, I made my way over there, and had to endure an agonizing five (5) seconds of searching before I located the bird.
Iceland Gulls are exceptionally rare on the West Coast of the United States; their scarcity is due to a mix of genuine rarity, a sad and poorly understood clusterfuck of a taxonomic nightmare (Is a Thayer's Gull an Iceland Gull? Is a Kumlien's Gull part Thayer's Gull? Is a Kumlien's an Iceland Gull? Is Kumlien's Gull its own species? Yadda yadda yadda...), debatable field marks, and people being horrible at identifying gulls.
Originally reported as a glaucoides Iceland Gull, I would wager it's more like a bleached Kumlien's. Hell, maybe it has some Thayer's in it, but I've certainly never seen anything like it. Anyways, I'm not going to to jump in to the semantics of Iceland/Kumlien's/Thayer's Gull i.d., I'll leave it to you.
The ultimate shot for larophiles. It has a tail band but no apparent contrast between the inner and outer primaries. Whatever.
Getting harassed by the big bullies.
Here is a pooping Thayer's Gull for your edification. There are multitudes of Thayer's at Fort Baker right now; some are very bleached and approach the paleness of the Iceland Gull. Some look dark and crisp. This one is somewhere in the middle.