help with masking area

[Justine A5E78]

A combo of parenting and CC Smear on the "worm" seems to work for the beginnings of a "bird pulling worm" animation.

But how to get the "worm" coming out of the hole in the ground? 

[Mylenium]

You will have to work with duplicate layers to create the illusion.

Mylenium 

[Byron Cortez]

Una mezcla de Precomposiciones y Máscaras servirán para ese trabajo. 

[jcalcina]

Thanks guys