it is no coincidence as you can see here that chicago is on the mississippi flyway. toronto across the great lakes as of january 1 of this year has mandated bird friendly construction. and originally had voluntary guidance and those became mandatory this year. minnesota is developing bird friendly construction standards. san francisco is there to lead the way. the guidelines that i have seen develop by the planning department are far more detailed and thoughtful than ordinances and guidelines that i have seen from other cities. i'll let anmarie tell you more about that. >> thank you to both of our guests iffer sharing some of the -- for sharing some of the science behind the issue. we have reviewed the research available and today we're giving to you the draft recommendations on how this research could be applied locally. the document summarizes proven successful remedies such as window treatments, lighting design, and lighting operation. the draft presents a three-prong approach to the problem. first t establishment of requirements for the most hazardous conditions