They know longer cut the weight of wood by 1/4. They reduced it to 1/2. Like so people can see this

This creature has a bonus where all wood placed on him will way significantly less. So Pitt all your wood on him

Wild castoroides sometimes build dams which can contain cementing paste, wood, silica pearls, rare flowers and mushrooms. But accessing the inventory of a dam will make the beavers angry so watch out!

If wild castoroides are penned in a small area (large tamming pen) they will create dams you can harvest for wood, cement, etc.