Abstract: Eggshell ultrastructures of Silver Pheasant (Lophura nycthemera),Common Quail (Coturnix coturnix),Pheasant-tailed Jacana (Hydrophasianus chirurgus) and Ashy Drongo (Dicrurus leucophaeus) were observed and researched by scanning electron microscope. The results indicated that the eggshell structures of four birds were much similar with other bird species, which were outer layer, spongy layer, cone layer, mammilla, shell membrane layer and pore channels through the shell from outer to inner. But obvious differences about the amounts and diameters of vesicular holes in spongy layer, the amounts of pores and mammillas of inner surface and the thickness of radial sections within the four birds were observed. From high to low, the arrangement of the amounts of vesicular holes in spongy layer was Common Quail, Silver Pheasant, Ashy Drongo and Pheasant-tailed Jacana； the arrangement of the diameters of vesicular holes in spongy layer was Silver Pheasant, Ashy Drongo Common Quail and Pheasant-tailed Jacana; the arrangement of the amounts of pores of inner surface was Silver Pheasant,Common Quail, Pheasant-tailed Jacana and Ashy Drongo; the arrangement of the mammillas of inner surface was Common Quail, Silver Pheasant,Pheasant-tailed Jacana and Ashy Drongo; the arrangement of the thickness of radial sections was Silver Pheasant,Common Quail, Pheasant-tailed Jacana and Ashy Drongo. The different structures are related with specific difference and living environment. And it is also the accustomization for environment.

Key words: Silver Pheasant (Lophura nycthemera), Common Quail (Coturnix coturnix), Pheasant-tailed Jacana (Hydrophasianus chirurgus), Ashy Drongo (Dicrurus leucophaeus), eggshell ultrastructure, Silver Pheasant (Lophura nycthemera), Common Quail (Coturnix coturnix), Pheasant-tailed Jacana (Hydrophasianus chirurgus), Ashy Drongo (Dicrurus leucophaeus)