Nest Keys?

[Cheezeburger]

I guess I'm the first to ask this but I shot down a birds nest and inside was a 'nest key', no idea if it's useful or just junk anybody know?

edit: I guess the description specifically references the lower semine mill so I'll poke around and see if it unlocks something D:

[corthew]

Must be a crow's or magpie's nest. They love shiny things. I'd likely not waste time with it but you have it in your inventory anyway now in case you ever encounter the door it fits. Maybe someone else knows something. I'd expect whatever it fits to be near where you found it though. A campsite chest, a cave, a bathhouse? Somewhere people might leave a key laying while they sleep or otherwise relax.

[Cheezeburger]

ah I found the chest it unlocks, nothing special but you can probably unlock it with normal thievery, Mutt actually found the chest for me by barking and it was just unlockable so I'm assuming the key went to it