Flying bird stuck (minor spoilers?)

[narm]

After finishing the game for the first time, I was teleported from the volcano to the empire.

However my bird stayed near the volcano, and because flying is the only way to get there - now it is stuck there.

This prevent me from advancing in the post-game as well, because I can't reach forgotten village.

What can I do? Is there any way to make the bird come back?