Marsupials don't adjust their thermal energetics for life in an alpine environment.

Individual-nested-in-species (χ 2 1 = 286, P < 0.001) was a highly significant determinate of body mass overall, mostly due to species (variance = 187) rather than individual-nested-in-species (variance = 64.4), as was the case for all of the individual species ( Table 1 ).

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