Stones' Gimme Shelter - percussion instrument?

Cafe Society
1

Throughout all of Gimme Shelter, in just about every measure you can hear this sort of creaky percussion instrument. Anyone know what it is?

2

(More) Cowbell!!!

3

The cowbell is in Honky Tonk Woman, and I’d hardly call it “creaky”…

4

I’m thinking some sort of guiro.