Intraspecific behavioral variation is important in both deliberate and unintentional species introductions: response to Carrete et al.

In a recent review in TREE [1], we outlined a conceptual framework for how inter-and intraspecific behavioral variation may influence the success of unintentional species introductions, particularly during the pre-establishment phase of the introduction process [2]. Carrete and colleagues [3] argue that selective factors acting on intraspecific behavioral variation can also be important in the success of deliberate species introductions prior to establishment. We agree. Indeed, our review included several examples of how behavioral variability could enhance the post-establishment success of deliberately introduced species [4].