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Parking lot eggs.
Wetlands
Plover eggs I believe.
Spotted on Jun 21, 2012
Submitted on Mar 1, 2013
1 Comment
There's a good chance that these are Killdeer (Charadrius vociferus) eggs:
http://en.wikipedia.org/wiki/Killdeer
Killdeer nest on the ground in flat areas, often on flat roofs, fields and I would imagine on the edge of parking lots as well.
I am not absolutely certain. If you were that close to the nest, the parent bird shouldn't have been too far away. They have a distinct call that you might have heard if the bird was flying around above you or standing nearby.
There is a recording of the bird call on the Wikipedia page I linked to.