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Climate niche distance and phylogenetic distance for a comparison of 140 mammalian sister species. Diagonal line separates niche flexible (upper left) and niche conservative (bottom right) pairs. High values for phylogenetic distance indicate species only very distantly related to any other species (e.g. crested porcupine Hystrix cristata and European beaver Castor fiber), and for niche distance, very different realized climate niches.
