this is pretty old news, and I submit it without editorial comment:
http://archives.cnn.com/2002/US/08/22/satans.no.more/

yes, this was my HS and I continued to follow the story; they are now the Devils Lake Firebirds. http://www.edutech.nodak.edu/edcbb/Boys/teams/devilslake.html

NB: the girls have their own link; they're Firebirds too, just as they were Satans back in the day.

here's a site that lists "extinct" mascots.
http://www.halcyon.com/marcs/mascotdrop.html