Butterfly Garden at Boston’s Museum of Science, March 11, 2017. (Greg Cook)Butterfly Garden at Boston’s Museum of Science, March 11, 2017. (Greg Cook)Butterfly Garden at Boston’s Museum of Science, March 11, 2017. (Greg Cook)Butterfly Garden at Boston’s Museum of Science, March 11, 2017. (Greg Cook)Butterfly Garden at Boston’s Museum of Science, March 11, 2017. (Greg Cook)Butterfly Garden at Boston’s Museum of Science, March 11, 2017. (Greg Cook)