Assessment of wind farms’ impact on birds and bats is one of the most important aspects of investment development, involving investors, naturalists carrying out field studies, as well as administration bodies issuing environmental decisions. However, a discussion concerning the guidelines and principles regulating the process may not be carried out without industry representatives. Therefore, the Polish Wind Energy Association decided that the next Wind Energy Forum (5 December 2011, Warsaw, Mariott hotel) will be fully dedicated to the discussion on the methodology of assessment of wind farms’ impact on birds and bats.