Blender has bendy bones, bones that can bend with adjustable segments, I am experimenting with them by using one to connect the wings to the clavical with limited success. It occured to me that UE4 might not support that kind of bones so I thought I would post here before I get much farther. Here is a link telling you what they are if you are unfamiliar.
So can UE4 do it or am I wasting my time in Blender?