Help!! Bird egg!?

[LittleBigBantam]

I was walking around outside when I encountered this egg, decently far away from where my flock goes during the day.does anybody know what this egg might be??

 

[ChickenCanoe]

It would help to know where you live.
It could be a cuckoo or starling egg.
There are lots of green and blue eggs in the wild bird world.

 

[LittleBigBantam]

It would help to know where you live.
It could be a cuckoo or starling egg.

I live in the upper peninsula of michigan, in a forested area