The Gray Catbird is another bird whose song inspired its name. Though they make a lot of different sounds, including gurgles, squeaks, and whistles, their cat-like mew is very distinctive. Mew: Chipping Sparrow Unsurprisingly, given its name, the Chipping Sparrow's song is a series of metallic sounding chips. While “tweet” works well to describe a bird’s whistle, it also works for a human making a whistling noise. Some people can whistle like a bird. This is the best way to describe that whistling sound if they do. However, this is definitely one of the more specific whistling sounds.