We don’t usually think of seashells as a building material for birds' nests. However, the killdeer (Charadrius vociferus) typically lays its eggs in a shallow depression in the ground. It may also line the nest with stones and grass for camouflage.
Would you like to see your nature photo featured on TreeHugger? Join the TreeHugger Photo Pool on Flickr and add your photos to the group!