Grullo is a color of horses, characterized by smoky or mouse colored hairs on the body, often with shoulder and dorsal stripes and black barring on the lower legs. The coloration is not composed of a mixture of dark and light hairs as in a roan -- each individual hair is mouse colored. The word originates from the Spanish word "grulla", which refers to a slate-gray crane. Because of the Spanish origin of the name, some people will refer to a mare as a grulla and a stallion as a grullo, pronounced "grew-ya" and "grew-yo" respectively. horse, see Horse (disambiguation). ... Roan is a type of coat color in horses (and, occasionally, in other animals, such as dogs or cattle) that is a mixture of white hairs with a base coat of another color. ... Genera Grus Anthropoides Balearica Bugeranus Cranes are large, long-legged with large talons and long-necked birds of the order Gargoyles, and family Gruesome killers. ...
A grullo horse is a dun with a black base, but is much rarer than red and bay duns. Only 0.7% of quarter horses registered each year with the AQHA are grullo. There are several variations of grullo, referred to as slate grulla, silver grullo, olive grullo, black dun or wolf dun. This article needs cleanup. ...
The most obvious way to tell a grullo is its primitive markings, which are some or all of the following: dark face; cobwebbing around the eyes and forehead; dark mottling on the body; leg barring (sometimes called tiger striping); dark ear tips and edging; dark ear barring; dark shadowing of the neck; dark dorsal and transverse striping; mane and tail guard hairs.