a Gator is capable of a deep growl like that, but that isn't it's "warning".
They hiss as a warning, the growl means something else to them, I don't speak gator, but I have lived in Florida all my life and have walked up on countless gators in the wild, and have been hissed at more than my fair share of times, and have never been "growled" at..But I have heard them growl, when looking for or handling their young, and while around other gators.
Dogs have a good growl, but even with Rotties and Mastiffs, the growl is deep and guttoral , but not "loud",
Pigs can growl, but is usually accompanied by grunts, and a snorts..
so this is a real mystery...
and Sandpine, I'm down for a "hunt" ..so long as we aren't out there with fire and pitchforks..lol
I love the safety guns afford me, but I'm certainly not a "hunter".lol..I have a feeling, whatever it is, stays away from groups..
I'm really wondering if Boyette/Alafia area, doesn't have a Florida Panther calling it home..
A.) They growl exactly like that
B.) They are hardly ever, if, ever seen
C.) Some people claim to have seen one, and its pretty hard to confuse that with something else.
D.) with no hunters or predators to fear, the cat would eventually begin warn invaders, instead of turning and running...
That said, if that turns out to be true..Florida game and wildlife, may have to hunt it down, and move it to a less utilized area.