l_raty
laurent raty
And is it actually limited to oystercatchers? You also have a pied/black issue in stilts, which are in the same clade. (Stilts are closer to oystercatchers than 'Charadrius' alexandrinus is to Charadrius hiaticula, based on published genetic evidence...)And why are the pied forms more attached to sandy beaches and the black ones to rocky shores?
There must be very few genes regulating the pied plumage.
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