stains on the stucco wall ?

Could you please comment on the dark stains on the light color stucco walls in the photo? front and side of the house. is it simply stains left by the rain, or an indication of moisture problem behind the wall? thanks.

http://www.flickr.com/photos/34423911@N05/5495667680/

http://www.flickr.com/photos/34423911@N05/5495667680/

Probably moisture related issues / Get it tested

What Dan said…

We cannot diagnose a problem seeing a photo, testing, onsite inspection is necessary, not guessing.