Table 1. Allometric least squares regression equations for log metabolic rates (ml O2 min−1) against log body mass (Mb, g) for the four study species.
| Species/Variable (n) | Intercept (± SE) | Slope (± SE) | R2 | P |
| Dark-eyed junco | ||||
| BMR (23) | −1.425 (0.251) | 1.186 (0.196) | 0.635 | <0.001 |
| Msum (30) | −0.173 (0.394) | 0.806 (0.302) | 0.187 | 0.012 |
| MMR (33) | 0.338 (0.624) | 0.486 (0.473) | 0.030 | 0.312 |
| American goldfinch | ||||
| Msum (20) | 0.031 (0.486) | 0.609 (0.427) | 0.102 | 0.171 |
| MMR (20) | −0.847 (0.926) | 1.467 (0.819) | 0.151 | 0.090 |
| Black-capped chickadee | ||||
| BMR (13) | −1.258 (0.404) | 1.144 (0.364) | 0.473 | 0.009 |
| Msum (13) | −0.946 (0.480) | 1.560 (0.428) | 0.548 | 0.004 |
| House sparrow | ||||
| BMR (39) | −1.554 (0.778) | 1.167 (0.549) | 0.109 | 0.040 |
| Msum (39) | −0.614 (0.670) | 1.112 (0.467) | 0.133 | 0.023 |
Sample sizes (n) for the different metabolic measurements are provided in parenthesis.