Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
Here's an early western talkie with a fun parody of the cowboy-shooting-a-rattlesnake cliche. It teaches the trigger-happy snake-killer that there are harmless gopher snakes (that eat bugs!) found in the desert but also leaves us thinking that it's still OK to shoot every rattlesnake you see, just not the gopher snakes.
Three men are riding horses on a trail in the Superstition Mountains in Arizona looking for a gold mine. One of them, an inexperienced mining engineer, jumps off his horse, and struggles to hold his horse while awkwardly firing his gun two times at a snake and missing. The others stop him, shouting:
"Wait a minute!"
"He was about to attack me and my horse."
"Not him. He's just a gopher snake. He wouldn't hurt you. See, (strokes the snake) perfectly harmless."
"He doesn't look it."
"These things catch gophers and bugs. It's against the law to kill one of them. In fact out here it's about the only thing it is against the law to kill." (He puts the snake back on the ground.)
"Yeah, well, I still don't like the look in his eyes."
The script is based on a novel by Zane Grey but I don't know if the snake scene is from the book or added by the screenwriters.