"Arithmachicks!" I LOVE IT!!!!
:lau
And your assessment of the Ameraucana as a "mythical creature" is pretty spot-on, too, because even though they exist, they're technically mutts, too - a mix based off of Chile's rumpless/tufted Araucana. If you're looking for "The Holy Grail" of colored...
Chicken Math Geometric Theorem:
It's one of those "A square is a rectangle but a rectangle is not a square" kinda things. Oversimplified, an EE is a mixed-breed chicken that lays colored eggs. An Olive Egger is the result of adding a chocolate-colored egg layer (like a feather-legged Marans)...