Well, it may be elementary to Sherlock Holmes, but the identification of this Point Holmes gull has me baffled. This bird was photographed on the afternoon of 29 December 2016 at Point Holmes, Comox, Vancouver Island, BC, Canada. My initial impression in the field was perhaps something along the Glaucous-winged x Herring Gull spectrum, but I’ve never seen a greater covert pattern like this on that combo. In fact, the strikingly pale greater coverts and checkered median coverts reminded me of young Slaty-backed Gulls I’ve seen, though I’ve never seen a Slaty-backed that looked like this guy. That’s not saying much, as I don’t think I’ve ever seen any gull that looks quite like this guy. However, for comparison’s sake, compare the bird below to Figure 15 on the Birds Korea website here. I don’t have time to delve into a deeper analysis at this point, so for the time being am just including the photos below and hoping for some informed thoughts or opinions. Comments on this gull greatly appreciated.