Egg laying order in birds has important impact on the nutritional ingredients in egg yolk, egg shell pigments and egg shell thickness. Some bird species may control their resource allocation in eggs to achieve the optimal reproductive output by different egg laying order. Here we investigated egg coloration, egg size and egg mass with egg laying order in Russet Sparrow (Passer cinnamomeus) and analyzed their relationships. We found that egg mass increased with egg size in this sparrow, and both of them were not changed with the egg laying order. Furthermore, neither egg size (F4,77 = 0.356, P = 0.839, ANOVA) nor egg mass (F4,77 = 0.391, P = 0.815, ANOVA) correlated with egg coloration (Fig. 1). However, the chroma of egg background color decreased whilst egg markings density (Fig. 2) increased with the egg laying order. The decrease in egg background chroma (Fig. 3) may reflect the allocation of limited pigments within a clutch while the change in egg markings density implied that Russet Sparrow might increase egg markings density to compensate for the decrease in eggshell thickness with the egg laying order.