There is no widely established sign for "zebra" other than to simply sign
"horse" + "stripes." I do my stripe movement by using bent five-hands,
but a "4" hand works well too. When telling a story about a zebra, upon
first reference, I tend to sign HORSE BLACK WHITE STRIPES STRIPES.
After which I shorten it to HORSE STRIPES. The shortened version uses
only a single movement for "horse" and a single movement for "stripes."
ZEBRA:






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