|GBBG (2nd plumage cycle). Whiting, Indiana. 27 May 2014.|
Hatched and banded on Appledore Island, Maine (banded in July 2013). A resighting in September 2013 was reported from Rochester, New York (Lake Ontario).
|(Note: the red segments don't imply migration route)|
About 1,000 miles from where it hatched, this 1st summer bird will likely remain on southern Lake Michigan for the rest of the season. It will be interesting to see if it returns in subsequent years. Very intriguing is that the Hamilton Lake Watch near Rochester reports that Great Black-backeds are almost always seen migrating "westbound" in late Fall. Perhaps the increasing Lake Michigan winter population is one that exhibits an east-west migration, and doesn't originate from as far north as thought by some.
|Well into its 2nd prebasic molt (p1-p4 renewed, p5-p6 dropped, inner secondaries dropped).|
I must say, I'm very impressed by the banding efforts of Dr. Julie Ellis and her colleagues on Appledore Island. Many of their Herrings and Great Black-backeds have been reported all throughout the eastern United States, and even as far south as Flordia and the Texas Gulf Coast. Recall that Appledore Island was made famous when an adult Lesser Black-backed Gull (Green F05) was found there for several years hybridizing with an American Herring Gull. The data from Appledore has revealed valuable information about age distributions, migration limits, site fidelity and molt progression in these North American species. To read more on the Gulls of Appledore, click here.
It's no mystery that these large color bands seem to be the reason for so many resightings by ordinary field observers. The color bands are gaining popularity with multiple banders throughout the Great Lakes region and as far as St. John's in Newfoundland. Most impressive is Canadian banders now using these colored rings on Thayer's and Glaucous Gulls near the Arctic Circle, such as the adult Thayer's that Steve Hampton spotted back in January of 2014. I met up with Steve at a landfill in Yolo County, California where he promised me my lifer "California" LBBG. After easily checking off the Lesser and picking through some more gulls, Steve unexpectedly states, "I have a banded Thayer's Gull"!
|Adult Thayer's Gull with yellow band on right leg. Banded on St. Helena Island in the arctic. |
January, 2014. Photo by Steve Hampton.
|Map showing location sighting of adult THGU (Yolo County, CA), and banding location on St. Helena.|
Map by Steve Hampton.
For a photo of Black 3U4 in juvenile plumage see the Gull-Research website: