The lack of a clear definition of what constitutes success seems to be a major concern in reintroduction biology (Robert et al. 2015), and it is a subject widely discussed in both animal (Seddon 1999, Fischer and Lindenmayer 2000) and plant reintroductions (Menges 2008). Reported definitions of reintroduction success in the literature vary widely (see Chauvenet et al. 2013, for a review), from vaguely quantitative assessments (e.g. “establishing a self-sustaining population”; Griffith et al. 1989, Dickens et al. 2010) to taxon-specific definitions (e.g., specific number of individuals attempting to breed or successfully fledgling at 2 years; Reynolds et al. 2008). Robert et al. (2015) recently suggested that reintroduction success could be measured quantitatively and systematically using the International Union for Conservation of Nature (IUCN) criteria for threatened species, but they acknowledge that there is no general agreement on when to call a project a success.