Right now, you can see listings for the huntling: http://steamcommunity.com/market/listings/570/Huntling
There seems to be two different images that associate with it right now.
Everything I've seen so far indicates that there is only one model that resembles the last image. It begs the question if there really is an alternate skin? Also, why Valve would have two different images for this courier, especially in the case of only one skin?
I'd really prefer the first image if it does come in that variety.