The International Thylacine Specimen Database (ITSD) is the culmination of a four-year research project to catalogue and digitally photograph all known surviving specimen material of the thylacine (Thylacinus cynocephalus) (or Tasmanian tiger) held within museum, university, and private collections. Certainly in my experience this is by far the most thorough compilation focused on an extinct or endangered animal ever produced and, as such, bound to be enormously useful to many generations of scientists to come. — Prof. Mike Archer, Dean of Science - University of New South Wales