Did my chickens lay this?? a Black egg?!

[mmg003]

I went into my coop this morning and found this black egg right in the middle on the ground! I only have 3 types of chickens and i thought they all layed white or brown eggs. The kinds I have are Rhode Island Red, Black Australopes and Buff Orpington's. Is this a sign of a sick chicken?? I recently got my chickens a couple months ago 95% of them aren't laying only one of them is so far, so i dont understand why this one is big and black!!

 

[aggie9296]

Never seen a black egg nor heard of a breed laying it. Does any of it wash off? I'd have to crack it open to see what was inside. I doubt it's a wild bird or a reptile.

 

[Fred's Hens]

duplicate thread

https://www.backyardchickens.com/t/730938/are-my-chickens-sick-they-laid-a-black-egg