You don't have to have a property adjacent to a crop field or any sort of lawn that's sprayed with a pesticide or fertilizer in order for it to contaminate your soil or water. If that was the case, then we wouldn't be finding chemicals and fertilizers from farming all the way out in the Gulf of Mexico. This is the sort of thing I studied in college as an ecology major. Not a lot of people seem to understand how easily environmental contaminants can be spread, not just by water but on the wind and by movement of animals and people. Seriously, what other explanation do you have for completely unrelated birds losing pigment randomly in your flock? You can't seriously believe it's a genetic mutation that just happens to be occurring in totally unrelated birds all at the same time?
