Seventeen Turkeys

Walking up the trail yesterday I counted a flock of 17 turkeys foraging in the woods. Last year I woke up one morning to a bunch of turkeys on the road by the garden. There were 17. What is it about 17? Is it important that it’s a prime number? Can the turkeys only take 16 others around them then drive the rest away. Is this one family group with 15 surviving turklets?
Google 17 turkeys and you can find photographs with that title! I wonder what happens with other numbers.