Happily and busily planting, transplanting, and moving things around in the flower garden early today, I came across this
which on closer inspection
proved to be a robin's egg. But why the female robin chose to lay it out in the open, with no nest in sight and far from any trees or shrubs, is a mystery. The grass at left was provided by me, and after taking pictures I recovered the egg to protect it from marauding magpies.