Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
This was nominated for a best foreign language film Oscar for Colombia. It's about an Amazonian shaman who is the last survivor of his people and two scientists who are searching for a sacred healing plant over the course of 40 years. The movie takes place in two separate times with both scientists as they each work with the shaman. Along the way we see how colonialism with its rubber plantations and Catholic religion devastated the land and the people. The story is a bit confusing, and the snake appearances are minimal, but the cinematography and natural scenery make it worth a look.
In a segment that is broken up by the opening credits, we see an anaconda with some hatchling snakes and some eggs. It looks like she is eating some of the eggs and she also tries to pick up a hatchling in her mouth. Then we see a snake swim into some water with a cut to a snake swimming in a river next to a large rock on which a man is painting symbols as a canoe paddles up. This is the first meeting of a scientist and an Amazonian shaman who is surprised that the white man can see him. The shaman says at one point in the movie that an Anaconda descended from the Milky Way carrying their ancestors. The opening shots of an anaconda with its young is probably supposed to illustrate that point. Later the shaman tells the explorer that he must let the serpent embrace him, that her embrace will take him to ancient places. Somehow this anaconda myth and mysticism is worked into the plot, but I couldn't really figure it out.