Some "helpful" links so far:
http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/agdex3499#controlling
http://batcon.org/home/default.asp
http://www.ehow.com/how_6886_kill-vampire.html
My wife just tried spraying it with a hose. Apparently it stretched its wings, turned its little bat-head and gave her an evil eye.
Bat 1, Mrs. fredr 0