Interesting topic. There is this thing on the interweb called "google" that can help. Of course, since these are from fish and game departments you may not believe them.

Bruce

https://ag.tennessee.edu/fwf/Documents/C...populations.pdf

http://www.myminnesotawoods.umn.edu/2018/04/wild-turkey-and-ruffed-grouse-the-mistaken-blame-game/

https://www.wpr.org/wild-turkeys-arent-actually-hurting-ruffed-grouse-populations%2C-expert-says