The animal bride/bridegroom tale is my favorite kind of fairy tale! Most of us have herd of the frog prince and beauty and the beast, and some have heard of east of the sun west of the moon, there are many animal bride/groom tales
This website is a good introduction to this subject

http://www.endicott-studio.com/rdrm/rrMarriedToMagic.html


A Russian fairy tale is The Frog Princess it was made into a an animated film in Russia and dubed in english

Here are the four part as found on youtube
http://www.youtube.com/watch?v=29XTzwPpE0Y
http://www.youtube.com/watch?v=m6VbF7BKB5k&mode=related&search=
http://www.youtube.com/watch?v=pUj63QAbHrw&mode=related&search=
http://www.youtube.com/watch?v=jpRBU11CKuY&mode=related&search=