Fig. 3From: Unveiling the hidden economic toll of biological invasions in the European UnionContrasting information between invasive alien species with highly reliable, observed costs (X, box; upper left) and the subset of these that was reported at the country-level (Y, box; lower left) in InvaCost v4.1 and the total number of known alien species reported in Briski et al., unpublished data (Z, box; right) in each European Union member state (blue)Back to article page