Fig. 2

Gross energy intake (a), fecal energy (b), digestible energy intake (c), and digestibility (d), of Silky Starlings (Sturnus sericeus) captured in either winter or summer in Wenzhou City, China. Data are shown as mean ± SEM, *p < 0.05 and **p < 0.01. GEI gross energy intake, FE fecal energy, DEI digestible energy intake