You cannot visually: you simply must trust the potato sommelier.

The Kiwi does not even resemble a potato.
@previous (A)
"Kiwis, and other ratites (large flightless birds). Taste: somewhere between beef and duck, this deep-red meat is rich and gamey, but with a less fatty texture."
I bet the Kiwifruit complements the cooked Kiwi bird.