Base on the observed bird behavior in Hunan and the fault characteristics of bird-related failure in Hunan Power Grid from 2006 to 2016

the bird-related failure risk for overhead transmission lines in Hunan Power Grid is analyzed.The results showed that the high level of risk regain for bird excrement outage are major concentration in northern Hunan

central Hunan and western Hunan

the area of Ⅲ level of bird excrement outage risk regain is about 5.03% to total area of Hunan Power Grid

and to the Ⅱ and Ⅰ level of bird excrement outage risk regain

the percentage is 15.24% and 79.73% respectively. The high level of risk regain for nesting outage are major concentration in northern Hunan and eastern Hunan

the area of Ⅲ level of nesting outage risk regain is about 5.23% to total area of Hunan Power Grid

and to the Ⅱ and Ⅰ level of nesting outage risk regain

the percentage is 16.12% and 78.65% respectively. The bird-related outage risk of overhead transmission lines in Hunan Power Grid for distribution map is drawn

and the application suggestions of the risk distribution map are also proposed in the paper.