Kumlien's Iceland Gull Larus glaucoides kumlieni
March 30th 2009 Choshi Chiba Japan
This Kumlien's Iceland Gull (the 5th bird in this winter) was found on the previous day. The combination of large eye and small bill stood out among regular gulls. The white spots to the primary tips were restricted because of its age. But its dark parts were obviously grayer and less extensive than in Thayer's Gulls.
Comparison with a 4th winter Thayer's Gull on the same date. Note the less extensive and grayer markings, especially the big P9 mirror. The P5 has a tiny, smudgy spot. But it is often invisible from a distance, and is suspected to disappear in a few years.
With a Slaty-backed Gull.
A good comparison with a Glaucous Gull. Note their very different eye-bill ratios.
Comparison with a Slaty-backed Gull. Note the small head and bill.
Movie on Youtube
Beware of the terrible wind noise... High quality version is available. Click play button, then, click "HQ" button.
Besides, try to find a 1st winter Thayer's Gull in the background !