Motion Tutorials shows how to work with DUIK and the tail structure for animation.

This tutorial from the Motion Tutorials channel shows how to create and animate a tail structure in Adobe After Effects. DUIK Bassel added the ability to rig using preset structures that allow you to create character rigs based on modules. 

Typically tails pose challenges in animation because you need to select and animate all the joints or linkages simultaneously. DUIK makes it easy to select and animate many bones at once, allowing you to get that tail type of pose quite quickly in After Effects.