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. 2012 Mar 27;7(3):e34271. doi: 10.1371/journal.pone.0034271

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Swanson et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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. Metabolic values with the same superscript do not statistically differ from each other. BMR and M_sum were both lowest in summer birds and elevated at other times of the year. M_sum for South Dakota (S Dakota) birds in April was nearly significantly greater than that for summer Wisconsin birds (P = 0.062).