Literature search methodology
We conducted a systematic search for studies that examined the relationship between dispersal-related traits and range size. We used Web of Science and the Core Collection database with the key words search criteria ”dispers*” OR ”dispers* trait” AND ”range size” OR ”species range” OR ”geogra* range”. We restricted our search to scientific articles published in English. Our search yielded a total of 3,139 scientific articles. After a first screening based on article’ titles and abstracts, we discarded studies that were clearly irrelevant (e.g., studies in other fields like physics, studies that do not formally assess the dispersal - range size relationship, studies on single species, studies that use genetic metrics as proxies of dispersal, studies on range expansion or range shifts). We assessed 104 articles for eligibility by reading the full-text and we further excluded perspectives and review articles or studies that did not include empirical tests (i.e., strictly theoretical papers; see Table S1-S4 in Database). After cross-referencing and including newly published articles, 86 studies and 478 relationships between dispersal-related traits and range size were included in our systematic review. For an overview of the search methodology, see the Prisma diagram (Fig. S1 Suppl. Mat.).