However, there are some animals that make noises that could be described as similar:
* Grasshoppers and Crickets: These insects make a chirping sound by rubbing their legs together. While not a rattle, it can sound somewhat rhythmic and percussive.
* Snakes: Some snakes make a rattling sound by shaking their tails, which contain a series of scales called "rattles." This is a warning sound, and it doesn't sound exactly like a baby rattle, but it does have a similar quality of shaking and clinking.
It's also possible that a rattle-like sound could be created by something like:
* Dry leaves rustling in the wind
* Small rocks or pebbles tumbling around in a hollow space
Let me know if you're interested in hearing specific examples of animal sounds!