title: Introduction to the Darwin special issue: The abominable mystery1.
authors.affiliation: Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9 Canada.
authors.forename: Ruth A
authors.initials: RA
authors.lastname: Stockey
authors.forename: Sean W
authors.initials: SW
authors.lastname: Graham
authors.forename: Peter R
authors.initials: PR
authors.lastname: Crane