I’m far from an expert, but I have turkey vultures around my house, and the ones we have here tend to have less feathers on their head. Maybe that’s just for some of them or in some cases? Ours have enough of a featherless head though that you can see the red/pink even when they’re gliding pretty high up.
When you think about how compact Copperhead is compared to how much violence it distributes, it’s frankly amazing