I agree with gnu, take it down immediately. The devastation caused by glass and mirrored glass to the songbird population is massive. Granted tall buildings on migration routes cause the greatest death tolls, but why add to the problem by erecting mirrors outdoors in residential areas.

Other neckbreaking obstacles include glassed in patios and decks. The little buggers have a hard enough time with free roaming cats, why add more problems to a life already fraught with danger?