Does a coyote whistle scare coyotes off?

A coyote whistle can be effective in startling coyotes and potentially scaring them off, as it creates an unexpected sound that may signal danger. However, its effectiveness can vary based on the individual coyote's behavior, previous experiences, and the context in which it's used. In some cases, coyotes may become accustomed to certain sounds and not react as strongly over time. For best results, combining the whistle with other deterrent methods is recommended.