Are people hearing birds?
I gave up turkey hunting for a few years for a number of reasons but I normally would hear birds when leaving for work in the morning around 5:30am. Last year I heard a few birds, the year before was more and before that it was loud in the morning.
I know there are birds around and one of the best parts of turkey hunting was waking up with the birds gobbling, now that does not happen, last year I heard 3 total gobbles while hunting even though there were birds around.
I live south of Ottawa, we do have a pretty high coyote population, might predators have them shutting up?