Mourning doves have multiple references in Bible. This bird is considered as The Holy Spirit that descended on Jesus when he emerged from water. In the story of Noah’s Ark where huge floods destroyed people and property, the dove returned with an olive branch when the floods have died down to convey the message that it was safe to venture out. Hence, the symbol of the dove with a twig signifies hope, reassurance and peace.
Michigan and Wisconsin states consider these birds as a symbol of peace. Even the famous Spanish artist Pablo Picasso has used the dove’s symbol to represent peace in the World Peace Congress that was held in the year 1949. In addition, these birds also depict solidarity and concord due to their dedicated maternal nature.
http://www.rocketswag.com/animal/birds/doves/Symbolism-Of-Mourning-Doves.html
