www.kpbs.org/news/2017/mar/27/rare-butterflay-returns-san-diego-national-widllif/
www.sdfoundation.org/news-events/sdf-news/u-s-fish-and-wildlife-service-mitigation-project-helps-san-diegos-natural-environment/
www.fws.gov/cno/newsroom/highlights/2017/quino_checkerspot/