Wedding butterflies supplanted doves. Aside from lasting love because they mate for life, doves symbolise innocence and purity. You might giggle at how untrue that is for most couples, so butterflies gained popularity. Easier to handle than doves, they can be inserted into envelopes the guests release at the end of the wedding.
Symbolise new beginnings and transformation--one life to a shared life—with the use of wedding butterflies. The options for using it as a theme are endless.