Yes. Definitely SO. One parent was nearby when I came across it then the other appeared and shooed me away. No doubt - SO's. Egg is also much bigger then RCP but doesn't show in the photo.
Hi. I help with the nesting shorebird monitoring and am absolutely confident but I understand that it is impossible to moderate. No Pied Oystercatchers were there that day and it was sooties that chased me off. No worries.