Late autumn and early winter is the time to find the biggest diversity of gulls in Oregon. I led a field trip to the coast at the end of October. Strong storms from the west had moved a lot of birds close to shore earlier in the week, but on the day we arrived, strong east winds had driven a lot of birds back out to sea. At least we didn’t get rained on.
At the Seaside Cove, a few gulls posed for us in the sun. This gull is mostly Western, but the streaking on the head and neck suggest some Glaucous-winged ancestry.
This is a fairly robust Iceland Gull (Thayer’s subspecies).
A closer look at the Iceland. The yellow bill will fade as the season progresses.
There aren’t a lot of places in the Portland area to get close looks at gulls anymore. This group was hanging out on a bar in the Willamette River. The flock was a mix of California, Ring-billed, Herring, Iceland, Glaucous-winged, Western, and a mass of messy hybrids.
While scanning the genetic soup of confusing hybrids, it was refreshing to land on a Ring-billed Gull.
While this bird ticks most of the boxes for Herring Gull, the bill seemed a little too heavy to me. This, combined with the primaries which were slightly less than jet black, suggest this might be a Cook Inlet Gull (Herring X Glaucous-winged).
This Glaucous-winged Gull was hanging out in a flock of Cackling Geese at Amberglen Park. I am guessing that the grazing geese were stirring up worms for the gull.