I would reckon taming one of these as your first animal. For me, (Don't know about you though) the game throws a sandstorm in a short while after starting Ark: Scorched Earth, and these guys detect weather effects. Here is a link for all the signals (Not my channel, I don't have one) https://m.youtube.com/watch?v=fxWFympIoiM
DO NOT believe that this reduces weight on its inventory. As of today AUG 2020 I tested stacks of meats and berries etc, IT DOESNT. But instead it increases spoil timer of foods, meats and berries on its inventory. ⬆️ to prevent ppl from false informations!
Ok so I don’t know if they fixed it since the other person tested it, but they do “half” the weight of items!
The thing is they do it differently other creatures. Instead of half-ing the weight per-item they half there TOTAL weight when on your shoulder. So if you have them hold a stack of berries that way 10., on your SHOULDER they will only at 5. weight! Hope this helps