Abstract: In June 2009-April 2010, five surveys with transect method were conducted on the birds in the farmland and slope land along four electric transmission lines in Jieyang of Guangdong. A total of 73 bird species were recorded, 43 species of which were on the electric transmission lines and had a high similarity in their composition. Tree Sparrow (Passer montanus) and Red-rumped Swallow (Hirundo daurica) were the dominant species in the farmland and slope land and on the electric transmission lines. Though the bird species richness and abundance were higher in non-breeding period than in breeding period, the conk out times of electric transmission were more in breeding period because of the nest-building, feces, and nest material slide of the birds on the tower supports. Black-collared Starling (Gracupica nigricollis) was the most common species impacting the electric transmission in Jieyang.

Key words: Transgenic plant, Biodiversity, Agroecosystem