this website exists no more:
http://www.biology.ucsc.edu/classes/bio161l/NUDI/cfernald.html
http://www.mareco.org/KML/endangered/view_details.asp?Cpage=1&pics=&SpeciesID=57&Rcount=60
http://www.slosea.org/initiatives/is/invertdata.php?viewline=51