Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
It's hard to think there was a time when a family adventure movie could be the biggest box office hit of the year, but this one was the biggest earner in 1960. It takes place in the early 19th Century when Napoleon was emperor. An American family of six on their way to New Guinea are shipwrecked on a deserted tropical island. They build a giant treehouse and settle in with the local wildlife which somehow consists of species from at least three continents, including tigers, elephants, zebras, hyenas, ostriches, cheetah, and macaws. In order to survive on the island, the family has to fight pirates and some of the wildlife, including a huge Anaconda.
The snake scene begins when we see two of the teen brothers wading through a swamp along with a girl they rescued who has disguised herself as a boy. We see a snake in the water then suddenly it is wrapped around one of the boys who fights it off until his brother comes with a large machete. This is a Disney film, so we don't see him kill the snake, but it is implied that the snake was killed since they all continue on their way.
The snake is an Anaconda, a snake from South America that is as out of place on the island as zebras with tigers. The first snake we see is a real live snake, and I think the snake used in the fight is also a live one, but it might have been sedated. So I give credit to the actors (James Macarthur and Tommy Kirk) for actually letting someome wrap a giant Anaconda around them for the scene.