Extended Data Fig. 10: General trends (decrease in SI over time, increase in SI over latitude, and increase in WI over elevation) observed in this study as exhibited by Turdus migratorius (American robin).
From: Abiotic conditions shape spatial and temporal morphological variation in North American birds
(a) Observed size index measures at one MAPS banding station (located at 39.3°N, 84.8°W) plotted over time. (b) Observed size index measures plotted across latitude. (c) Observed wing index measures plotted across elevation. In all cases, each black point represents one individual, the posterior mean of the linear predictor is plotted in red, while the red ribbon represents the 89% CI.
