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You have a nice selections of birds that I only seem to find in hard back lighting so I am envious of you nice light. Good low angles on these all.
Overall I see a Cyan cast to the images, I just tinkered with one, removed Cyan, and in Curves slid in the left side for more highlight and brought in the right side a bit for black depth/contrast so see what you think and see on color.
I am terrible at ID on shorebirds so thanks for showing the comparisons and the ID education, now I just need to get them in good light and in close
rework on WB and a bit of curves exposure