As to loss of birds due to supposed problems with soft shells, far more birds die when pesticide infested forests die and then burn. I grew up in timber country and saw this first hand. Once DDT was banned, the Tussock Moths took over along with Bark Beetles. Green forests turned brown and then black as they burned to the ground almost taking my hometown with them. How many birds died during and after the fire? We need to use such poisons with caution but banning them does far more damage.