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Figure 1


Fig. 1. Respiratory quotient (RQ=Formula 3CO2/Formula 3O2) (A) and {delta}13C value of expired breath ({delta}13Cbreath, {per thousand} VPDB) (B) versus time since first feeding following a fasting period (in min) for Anna's hummingbirds (C. anna; N=2) and rufous hummingbirds (S. rufus; N=10) as well as Pallas' long-tongued nectar bat (G. soricina; N=7). Data are averaged for each species.