Yes it is Stucki, there is an easy way, and a hard (but better) way.
The easy way would be to bind your mesh to one of the included skeletons. Export the Skeletal Mesh as FBX from the engine, and bind new Geometry to it in your 3D package. This way you can just duplicate any Bird Blueprint- and then simply swap out the existing mesh with your new one. This way you can use the existing Animations and Animation Blueprint.
The hard way would be to create your own custom Skeleton and Mesh, if you go this route you will need to create your own Animations and Animation Blueprint, just use the existing Animations and Animation Blueprint as your guide. It’s really not that hard- but certainly more work is involved. This way you duplicate any Bird Blueprint- Then swap out the existing mesh with your new one- and assign your new Animation Blueprint.
Hope that was helpful 