To make honey last practically forever, make a fishing rod and equip honey, that is about to spoil, to the fishing rod, then un-equip it. It should refresh the spoil timer. Does not work with leech blood. Tested on PS4.
In Mobile version, megatherium can be resurrect on the obelisk after killing it in the dungeon (plase in mobile, where you can have battle with bosses). It doesn’t live in normal world. In mobile it eats an old kibble: baryonyx egg+raw fish+potato+mejoberry+fiber. It is very important information for mobile players!
Can be picked up with quetz. Found them very quickly in the snow area. Also seems like it can gather just about anything. The buff they get for killing insects also seems to increase the damage it does on other creatures
Can be carried by a quetz and a wyvern. Can attack your mount while being carried if it's facing in the direction of it and can be tamed using honey. Drop it in with a quetz or wyvern and tranq away. Eats honey pretty slowly but very decent efficiency off of it.