How to track: Like the other trackable hunter pets, you will not be able to see him when he's up. He is completely stealthed. In order to locate him, you will need to find and follow his tracks - tracks that thankfully only hunters can see. Once you've found his tracks you'll need to follow them until you don't see any more. This is where I like to wait and watch where I think that he'll be walking next. Often times you'll see a new track appear right in front of you - this means you've found him!
Once you find him, the only way to see where he is, will be for him to walk through a flare. Don't throw your flare down on top of the track he just left, throw it a little further out in front of where you think he is. When he walks through your flare he will become visible. You can take this opportunity to tame, or you can throw a Hunter's Mark on him - which will keep him visible to you when he goes back into stealth. Hunter's Mark will make him visible to you, but only you when he's in stealth.
Hexapos' tracks are called "Mysterious Tracks", and like other beasts' tracks they do not stay up indefinitely; the furthest ones behind disappear one by one as new tracks are created. His tracks are fairly light in color compared to the dark ground that he's walking on - making them a little easier to find in my opinion. As I've mentioned before, turning ground clutter onto the lowest setting will make finding tracks a lot easier.
(As of patch 5.2 it looks like Hexapos' tracks are now facing the correct direction. No more following backwards tracks! Thanks Nyxie for the info!)
Hexapos' path starts from the the very northwest part of The Briny Muck, where the Venomous Ledge and the Stinging Trail Meet. He heads east for the first third of his path, until he reaches the Chittering Coast and veers north. He continues north until he makes a loop just east of Kypari'Vor. From there he moves west across the length of the zone until he reaches the edge of a cliff in Rikkilea. It takes him around 50 minutes to move from one end of the path to the other. When he reaches the end of his path, he simply turns around 180 degrees and heads back in the direction he came from.
|Click map to Enlarge|
|Above from left to right: Hexapos is heading east on The Stinging Trail just north of The Brink Muck, and then continuing toward Mazu's Overlook|
|Above from left to right: Heading through the Chittering Coast, then walking through the shallow edge of the Lake of Stars and up into The Horrid March|
|Above from left to right: Hexpos is heading past the Forgotten Mire, then under a massive tree root just northwest of the Writhingwood. In the screenie on the right he is heading through The Thundering Run, starting the northeast loop of his path|
|Above from left to right: Heading west through the Thundering Run after making his northeast loop. In the right screenshot he is beginning to cross the Horrid March, just south of Fear Clutch.|
|Above from left to right: Hexapos is heading west just south of Rikkitun Village, and heading toward the northern end of his path.|