Unreal Cassowary(UV map)

Mesh_CassowaryHighPolyFeatheredMultiUVMopher has two UV coordinates.
The first coordinate system is used to give bilaterally symmetrical texturing.
The second coordinate system is a UV layout like the one below which has no overlap for each of the body and feathers.

These are not used in materials in this asset.
This is prepared for when you want to texture with asymmetry such as injury or dirt.