Calculating a Theoretical Collision Risk Assuming no Avoiding Actions

Windfarms may impact on ornithological interests in a number of ways. There may be: loss of habitat due to the construction of turbine bases and tracks, displacement of birds as a result of disturbance, and potential mortality through collision. SNH Guidance note describes a methodology for assessing in full the impact of windfarms on ornithological interests, taking account of each of these effects. The methodology includes a two-stage process for the assessment of collision risk.