Fifteen nests of White-bellied Redstart (Hodgsonius phaenicuroides) been parasitized by Common Cuckoo (Cuculus canorus) were found during the breeding season from 2009 to 2012 at Lianhuashan Nature Reserve, Gansu province, with a parasitism rate of 16.48%. To the human eye, 12 out of 13 eggs of Common Cuckoo were slightly blue in color and were different from the dark bluish green eggs of White-bellied Redstart, except one matched very well. The mean weight of Common Cuckoo eggs was 3.76±0.16 g, with an average long axis of 22.19±0.52 mm and an average short axis of 17.62±0.47 mm (n=10), respectively. There were significant differences in weight of eggs (t=11.208, df=38, P<0.001) and short axis of eggs (t=0.970, df=38, P<0.001) between Common Cuckoo and White-bellied Redstart. Our research showed White-bellied Redstart can recognize eggs of Common Cuckoo, 7 nests were confirmed deserted after being parasitized and 4 nests accepted while the remaining 4 were unknown.