If killed or knocked out, they leave a metal battlement and a curved metal battlement in their inventory, so grab it, place it next to your smithy, then demolish (or keep for barrier) to get a ton of metal and cementing paste! Up this so developers can know about this!
Low levels should not go into their dams. The moment you open it’s inventory, them beavers are gonna mess ya up. If you are planning to take from them, have an escape mount like a flyer or a strong dinosaur.
Seriously, I’ve had multiple near death experiences. ;-;
Don't break the dam because the Beavers will attack. One time I was trying to tame a Beaver and I found the dam. I broke the dam and my poor pachy didn't know what hit him. At least ten Beavers attacked us.
Just because u can't ride one doesn't make them worthless! Take him to a group of trees and set him to wander and he will harvest them for you, this is better than a metal hatchet for wood if you level his melee, I would tame one the moment I unlocked tranq arrows to make setting up a base easy!
My advice for the island is look at the edges of swamps their dams tend to be built in that area and keep a flyer close because once you start to tame them they have a weird tendency to attract titanaboas...