buzzards can smell and that is their defence as it is their scence of servival.

Turkeys on the other hand Can not smell and have not got that scence. It is that common fluke that at that such time that when bugs are out that the birds don't want to come to you.

Now this is my opinion on this time of year.
Because Turkeys have the scence of Eye sight , they also have 2 other very good scences and one fits right into this issue.
1/ Eye sight 10 x better then us.
2/ Hearing 5x better then us.
3/ memery turkeys don't forget.

now with that being said turkeys can hear 5 x better then hunters. When at the time you are hunting at the time of year that the mosquitos are out and heavy, we have to use spray to stop biting. At this time have you ever noticed that at times it is hard to hear when mosquitos are buzzing around your head. Well if a turkey can hear 5x better then us , they can hear these such mosquitos aswell and can pickup on the extra noise that is coming from the area you are calling from. This could very well play a role in why it is harder to work birds in these such areas.

I have seen this with Black bear hunting in the spring time. At times you can not hear yourself think. So if the noise of mosquitos are that bad , then a bird that has the scence of hearing like turkeys could hear it far more superiour then us...BT