The study of avian reproduction has a long history. The author studied the reproduction of desert shrike (Lanius isabellinus) in An xi desert nature reserve in Guazhou, Gansu, in2011and2012. L. isabellinus is one of these breeding birds in Guazhou, and it has obvious sexual dimorphism which makes it is easy to distinct the male and female. L. isabellinus always nests in trees. Egg color of desert shrike is light cyan. Mean egg length is22.05±1.00mm, mean egg width is16.67±0.57mm. The mean egg volume is3.14±...