I'm from Southern Ont. as well and I would have to agree with Phil when he says "hens"... Theres a ton of different excuses to roll with but hens will do it every time... If you get the chance get closer early in the morning and sit still till later in the morning... they've heard you and now especially in the late season the hens will hit the nests leaving the big boys lonley... i've been fortunate enough not to have had the hens be an issue yet this year... definitely a first... stick with it man - right to the end...
Gerard