Jere is what I think happen, and I really don't have graphs or biology phD to back it up.....tureys were re-established when the fur market was sound, therefore birds nesting success was high, did some get destroyed, absolutely, but it is a numbers game, predators numbers were low, and turkey numbers growing and growing (with low predators compared to the high predator number 20 years from now).....that went on for awhile (thankfully)!!!! Turkey were flourishing and then fur market bottomed, turkey numbers remained good while predator numbers were re-establishing if you will .......all the while turkey numbers slowly dwindling as more predators crushed nests and the impact was not felt immediately. then terms like "environmental resistance" were coined, but the true definition is more predators mean less clutches hatching year to year.....spend our tax money on all these studies and such and have cute phrases coined, but the situation is a direct result of a few simple things, these two things are mentioned by EVERY biologist when they start any turkey population discuss with falling population numbers.....wait for it.....habitat and high predator numbers.