Oystercatchers? Did someone mention oystercatchers?
I just happened yesterday to have the good fortune to observe a nest of black oystercatchers hatching out ... below is a link to my first rough video outtake of the event. The day presented a rare trifecta for shooting video on the coast (great subject matter! perfect light! zero wind!), allowing vivid 4K capture of a host of beautiful and interesting behaviors (e.g., I would definitely have been last to guess the little fluff-balls would roll straight out of the egg pumped up for a knock-down, drag-out fight!).
As for posted concerns re predators ... gulls were frequently observed perching on rocks directly overlooking the nest — which, so clearly "hidden in plain sight," BOC parents would occasionally leave unguarded, without any evident concern — while concurrently, seemingly in stark contrast, hordes of gull cousins at nearby Yaquina Head were expending every effort under the sun to steal every possible egg and/or chick of common murres trying to nest there. No other potential predators were noted through weeks of observation by the two voices that can be heard in the background audio, mine and the Audubon volunteer documenting nest activities. With no other explanation evident as to lack of gull interest in an unguarded oystercatcher nest, we were left to wonder if perhaps, as a matter of natural selection, black oystercatcher eggs and chicks simply ... don't taste good?