Fig. 2

Fitted model values (± SE) of top model predicting bird mass a and wing chord b of juvenile Japanese quail (Coturnix japonica). Fitted model values (± SE) of top model predicting bird mass a and wing chord b of juvenile Japanese quail. Points represent masses of individual birds connected by dashed lines. Birds differ by sex in both cases with males being smaller. The sudden drops in wing cord observed in two individuals are believed to be from beating wings against the rack walls. Impacted individuals showed no other signs of injury