Fig. 2. Plasma metabolite concentrations in red-eyed vireos prior to and immediately following exercise. Values are means ± S.E.M. (N=5). Asterisks above the bars denote significant differences in plasma metabolite concentrations (P<0.05) just prior to and immediately following exercise. Diet did not influence plasma metabolite concentrations prior to or immediately following exercise (P>0.21 for each metabolite) and so is not shown.