Bird survey data from six operating wind farms, of varying size and with varying levels of goose usage, are reviewed. All six wind farms show very low numbers of collisions between geese and the turbines, typically one goose collision per year per wind farm. This level of collisions is not significant in goose population terms.
The data are used in conjunction with a Collision Model to calculate a Goose Avoidance Rate of 99.93%.
Finally it is noted that the survey data for geese, taken in conjunction with similar data for Hen Harriers, raise questions about the validity of collision modelling.