He's a dun. Duns have markings like a dorsal stripe, zebra barring on their legs, a sort of shading mark on their withers (this isn't as common as barring or a dorsal stripe. I've never seen it on a horse in person, only in pictures). And they're usually kind of a duller colour compared to a buckskin that has yellow tints to it. But he's sure a pretty boy and hugeeeee. :)
Buckskins don't have any of those markings. They have black points on their legs, but no barring and no dorsal stripe. My avatar is my mare, who is a buckskin.
ETA: I looked at the pictures again, and he has a bit of of the wither shadowing. (I'm not sure its actual name..)
Last edited by Poseidon; 01-17-2011 at 11:17 PM.