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...ns (Nams 2005; Oecologia 143: 179-188) that the fractal dimension D of a trajectory changes within scales, and that the fractal dimension could be a valuable tool in multiscale analysis of wildlife movement patterns. The adehabitat package, increasingly used as a free-open source alternative in radiiotracking and animal habitat selection studies, already has base functions to deal with trajectories in time and space, both as regular samples (e.g. data from GPS radio tags) and as irregular ones (as in 'classic' VHF radiotraking). The implementation of the algorithms devised by Nams could w...