"Michael Healy Butterfly Oiled Bronze Door Knocker The Monarch Butterfly Door Knocker is sand-cast in solid bronze and treated with a patina process to give it a rich antique finish.The Oiled Bronze Butterfly Door Knocker was designed by Michael Healy, an accomplished Rhode Island artisan. He has always enjoyed watching the beautifully colored Monarch Butterfly. Although the Monarch seems to be wandering in aimless flight it is in fact a marathon flyer that migrates from Canada and the northern States to Mexico each fall. The Monarch Butterfly Door Knocker was designed to capture this beautiful creature at rest on your front door. "