A swift flies past notes placed in the cracks of the Western Wall, Judaism's holiest prayer site, in Jerusalem's Old City March 11, 2012. The scores of small black birds who spend the spring flying high above Jerusalem's Old City and laying eggs in the cracks in the wall, where it is common for visitors to place prayer notes, have become a focus in efforts to rehabilitate the species' diminishing population worldwide. Picture taken March 11, 2012. [Photo/Agencies]