The first of each month is City Daily Photo's Theme Day. This month's theme is "the water's edge." This photo was taken at the southwestern end of the Oakland estuary which is being restored to marshland. Despite a freeway being a few hundred yards to the east and the airport less than half a mile to the west, egrets nest, wade, forage, and just plain rest in this end of the estuary. For more takes on the theme, visit City Daily Photo.