Detects weather events. Fast tail wagging means lightning storm. Barking at the sky means Sandstorm. Digging at the ground means Heatwave. Sniffing sound means Rain.
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!
Guy saying that jerboas don't reduce weight in their inventory, that is correct, however, if you put things into a jerb's inventory, and put the jerb on your shoulder, you only get half of the weight
When it says that it reduces the weight, you can only see this by putting things in it and putting it on your shoulder. It is a backpack, not a storage bin.