That 20,000 number is off by at least an order of magnitude just for US bird wind turbine deaths. Turbine construction has been accelerating, so the 2013 number

That 20,000 number is off by at least an order of magnitude just for US bird wind turbine deaths. Turbine construction has been accelerating, so the 2013 numbers cited below are low. https://abcbirds.org/blog21/wind-turbine-mortality/ https://abcbirds.org/blog21/wind-turbine-mortality/