1 Introduction Amid the ongoing biodiversity crisis, anticipating future extinctions—in terms of which species are likely to be lost—is a central focus of conservation research (Smith 1989). The extent to which species are threatened by anthropogenic pressure (e.g., climate change, habitat loss and fragmentation, exploitation, etc.) is mediated by complex relationships between their functional traits, demography, and interactions with other taxa (Batista et al. 2013; Cardillo et al.