Who laid this egg?

[Scooters]

We have five hens that are just reaching egg laying maturity, and today we found a beautiful little egg. There are two barnevelders, a black copper marans, a speckled sussex and a welsummer. Any guesses on who laid this egg? The roosters have been interested in all of them lately. The egg for size and color contrast is from our silver cuckoo marans. I'm certain it's not the sussex but otherwise I'm not really sure. Thanks!

Our maran lays chocolate colored eggs.

 

[Solanacae]

My Barnevelder would lay brown eggs that looked pretty much identical to this one that you shared.

 

[Cluckatar]

They are all laying now... and I still can't always tell the difference between the welsummer and the black copper marans. My barnevelders are consistently lighter than those two now that they're laying every day.