Posted 27 August 2012 - 01:23 AM
Are these both Semipalmated Sandpipers? They look a little too different from each other, but that might just be age. In large group of Semipalmated Sandpipers.
Posted 27 August 2012 - 12:20 PM
Posted 27 August 2012 - 08:24 PM
Posted 28 August 2012 - 01:02 PM
Thank you both. What had me thinking was the apparent difference in the thickness of bills. O'Brien, Crossley, Karlson mentions that females have longer bills than males (p147), but I did not see anything on variability for bill thickness.
I don't think bill thickness correlates with gender like length does, but it definitely does vary between individuals!
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