Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
This is like a western adventure movie with soldiers who fight Indians, but it takes place in the Florida Everglades in 1863. Five confederate deserters (Yellownecks) try to make their way through the Florida Everglades to reach the ocean where they will somehow get to Cuba. Along the way they encounter all sorts of "...horrible sneakin' murderous things all around..." including alligators, lizards dropping out of the trees, an Indigo Snake on a tree, a bobcat attack, a hurricane, quicksand, Seminole Indians on the warpath, themselves, and the worst, most horrible obstacle imaginable - at least by screenwriters with no imagination and no knowledge of snakes whatsoever - a "nest" of rattlesnakes - several snakes crawling or coiled up in the sand, in the open in broad daylight, all rattling together in a thunderous cacophony. (Forget all those other things - what will really terrorize you down there are the mosquitoes.) Early in the movie we see one of the men holding a yellow rat snake in the face of a second man who appears to be having a panic attack from a fear of snakes. Their leader comes and throws the snake to the ground but the panicked man still can't move so another man comes and stomps the snake to death with his boot. When we see the "nest" of rattlesnakes, most of the men just easily walk around them, but the ophidiophobic man stops in a panic, falls down, and is immediately bitten on the face, and immediately drops dead. Nevermind that a rattlesnake bite often takes hours to kill, in those rare cases where the victim actually dies. The rattlesnakes appear to be Eastern Diamond-backed Rattlesnakes which, like the other snakes we see, are appropriate for the Florida setting, although their behavior is completely absurd.