We were able to I.D. this Yellowlegs as a Lesser Yellowlegs, rather than a Greater Yellowlegs by the length of the bill compared to the size of the head. The Lesser Yellowlegs' bill is about equal to its head width, while the bill length of the Greater Yellowlegs is about 1 1/2 times the head width. You can see in the first photo, which is a profile shot, that the bill length and head width are about the same.
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