Watch as satellite imagery shows how the windy Ucayali River in Peru changed its course over the span of 25 years. The sharp bends of the original river start moving around and then even merge at some points creating a whole new pathway, while the leftover bodies of water are just put out on their own. It's just fascinating to see how dramatically things can change.
This scene also comes from the Ucayali River and it is a nice example of how both neck cutoffs and chute cutoffs form. First a neck cutoff takes place that affects the tight bend in the right side of the image; this is followed by a chute cutoff immediately downstream of the neck cutoff location, as the new course of the river happens to align well with a pre-existing chute channel