The others were Barnacle Goose, Western Kingbird, and Ash-Throated Flycatcher.
Here is the Western Kingbird. Note the brighter yellow color and black tail.
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Here is the Ash-Throated Flycatcher, note the duller yellow and rust-colored tail:
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Oddly, the first time I ever saw these geese was earlier in 2007 up in Rhode Island.
You can read about that adventure here.