I too have questions about how much impact birds have, especially when you cultipack. We manage habitat for turkey as well as deer, and I have never had an issue with flocks of turkey impacting a fall plant. I see flocks in my fields all the time eating seed, especially after planting, but have never had a significant impact on germination. Now, deer eating and killing plants before the germinate is common here. We have crows galore and some doves as well.
What is the difference? I'm not sure. Perhaps it is habitat in general. I also have fields with plenty of weeds and most birds seem to prefer those. I find a lot more turkey and quail in weedy fields with a clover base than in open newly planted fields. We also have bicolor as field separators and it produces millions of tiny seeds. So, maybe it is a general habitat difference. Or maybe birds are blamed where there is another dominate factor. It is easy to make the leap...I see birds in my newly planted fields all the time...I got poor germination...must be those birds....
I do hear folks complain about turkey and such eating seed, but I've never really seen any good studies on how much impact they actually have. I'm not saying they don't, just that it is not clear to me that they do, and for whatever reason, I have not experienced it at my place...
Thanks,
Jack