[Rocky]

http://www.beringia.com/02/02maina14.html

"The Yukon horse (Equus lambei) was a relatively small caballoid (closely related to the modern horse Equus caballus) species. It occupied steppe-like grasslands of Eastern Beringia (unglaciated parts of Alaska, Yukon and adjacent Northwest Territories) in great numbers, and was one of the commonest Ice Age (the Quaternary, or last 2 million years) species known from that region..."

[SunkenCiv]

Nice!

Here's something about zebras:

Zebra Crossing
American Long Ears Society
http://www.geocities.com/SoHo/Studios/2905/zebxing.html

"the Grevy's zebra has 46 chromosomes, the Mountain zebras has 32, while the plains h[a]ve 44"