Fig. 4
From: Function of the uropygial gland in eiders (Somateria mollissima)

Mass of uropygial glands in eiders (g) in relation to area of the wings (mm2)
From: Function of the uropygial gland in eiders (Somateria mollissima)
Mass of uropygial glands in eiders (g) in relation to area of the wings (mm2)