It is not so common, if they go together naturally.
The mares are not particularly interested in him.
Different zebra species doesn't normaly crossbreed in nature either.
Crossbreeding is usually feasible when man is involved, and the mare can not get away from the stallion of free will. I have seen that mares do not let the zebra mount, even when they are in heat.
He does everything a stallion does, Guard, protect, follow the herd at a distance when they walk.
Although, he is very tame, almost like a horse. He can be led , brushed, lift hooves for me.
