Wednesday, May 12, 2021 On May 7, the US Fish and Wildlife Service (USFWS or Service) under the new Biden administration published a proposed rule to revoke a final rule issued during the final weeks of the Trump administration, 86 Fed. Reg. 1134 (Jan. 7, 2021) (January 7 rule), which excluded incidental take from the prohibition against take under the Migratory Bird Treaty Act (MBTA or Act). 86 Fed. Reg. 24,573 (May 7, 2021) (Proposed Rule). This proposal is the latest development in a series of efforts by recent presidential administrations to implement competing interpretations of the MBTA, as we have reported in previous articles. If USFWS revokes the January 7 rule as proposed, the regulated community will once again face uncertainty regarding its exposure to criminal enforcement under the MBTA for unintentional take of protected birds associated with a wide range of productive activities. Notably this could include the operation of wind turbines, an activity that the current administration otherwise presumably wants to encourage as part of its effort to expand the use of renewable energy to address climate change.