What do we call an organism that feeds on other insects or organisms?

An organism that feeds on other insects or organisms is termed a "predator." Predators are typically larger or more powerful creatures that actively hunt and consume their prey for sustenance. This behavior is a crucial aspect of the food chain, where predators help to control the populations of their prey, contributing to ecological balance.

In contrast, parasites derive nourishment from a host organism, often harming it in the process, which is a different interaction than that seen with predators. Prey, on the other hand, refers to the organisms that are consumed by predators, not the ones doing the feeding. Scavengers are organisms that primarily feed on dead or decaying matter rather than actively hunting living organisms. Thus, the definition of a predator accurately captures the role of an organism that preys on others for food.