Could it be a flowering currant?
I have a bush that produces pink flowers.
Beautiful butterflies. Lucky you, and thank you for sharing it.
On second thought, maybe not a currant.
link:
http://www.google.com/search?q=flowe...=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7GGIT_en