Meaning it's the sound it makes? Howl? Don't remember anyone with howling avatar though (most have already been answered I guess). A tough one... And the new forum member search tool isn't much useful.
I think he just changed his custom title just for the fun of it... I still can't see how the picture is related to him. Unless... it is really YOU?! Damn it. Nobody could've guessed it from the picture???
I do know this - xenforo dropped the ball by not keeping the vbulletin reputation comments as a feature. The loss of the Reputation comments data when we switched to Xenforo really was the death knell for the site when it came to all the users that left. I know I missed it so much and I got way less interested in the site when that feature was gone and I run the site.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory