Right beyond our solarium, we planted catmint or Nepeta and enjoy the show of pollinators all day long. One morning though I was especially surprised to see goldfinch. First a pair arrived one morning, then it seemed as if they passed the word and the next few days several more birds arrived, perching on the stalks, swaying with the breeze and nibbling on the flower’s tiny black seeds. Here are some websites to learn more about goldfinch and catmint.
http://fwie.fw.vt.edu/rhgiles/speciesssm/goldfin.htm
http://www.daytonnursery.com/encyclopedia/perennials/nepeta.htm