How many dye channels do each of the new mount skins have?

I would like to update the Guild Wars 2 Wiki articles about the mount skins by listing how many dye channels they have. However, I don't have all the skins, and I have been told that not all skins have all four dye channels.

Could those who have some of the skins tell us how many dye channels each of them has?

I did a quick check on mine and the only ones with the three dye channels were two of the plainer skimmers - the Spined Longtail and the River Moth Wing.

This is a list of my skinsRaptor: Flamelander, Savannah Monitor, Striped Trihorn - 4 channelsSpringer: Desert Lop, Tawny Hare, Windy Spot - 4 channelsSkimmer: River Moth Wing, Oceanic Ray, Spined Longtail. Oceanic Ray has 4 channels; the others, 3.Jackal: Pyroclast, Twin Sands, Stardust - 4 channelsGriffon: All of the griffons - 4 channels

Raptor - Canyon Spiketail - 4 channelsSpringer - Elonian Jackalope - 4 channelsJackal - Crowned Ancient - 4 channels.

But there is an easier way to do this--this Youtube video shows the owner equipping all the skins one by one, and it shows the dye channels on each.