If you want to tame these at a high level bring crops or kibble. They are disgusted by mejoberries.
Castoroides

Player-written tips for taming, using, and fighting the Castoroides in ARK: Survival Ascended & Evolved.
You need a LOT of narcs to tame this giant beaver just get on a rock and shoot it also u need lots of berries
Have a tribemate pick up the beaver with an argy, carry it to your base (or safe place)... have tribemate hold the beaver up with the argy and you shoot until it falls. Easiest way in knocking it out.
Here is how to tame a beaver
1. Bola it
2. Club it
3. Feed it
There you go now you have a beaver
Can be carried by argentavis well atleast by mine :)
Dododex, you can transport it with an argentavis, fix it please.
Be carefull when attacking cause they are pack dinos you may not see the others
For castoriodes, they can fit through a conventional pillar trap, so you have to put your pillars closer together rather then the normal length apart
Best Wood Gatherer and also pretty fast in water!
A good source of hide and pelt
Dam... Those things get aggressive when you loot their dams
How to raid beaver dams 1bread raptor army 2.raid 3.enjoy your mats
That are great for adventures but get it's health to around 1500 bethor adventures
Beavers get stam in the water
Step one get stimulants as they spawn near swamps and there can boas,
Step two go to a beaver respawn zone
Step three this is optional; a fast mount
Step four locate beaver
Step five locate beaver creek
Step six open creek and quickly loot everything(don’t grab wood as…
Step one get stimulants as they spawn near swamps and there can boas,
Step two go to a beaver respawn zone
Step three this is optional; a fast mount
Step four locate beaver
Step five locate beaver creek
Step six open creek and quickly loot everything(don’t grab wood as it will slow you down)
Step seven run away and watch all their hard work become yours
One time I started heading to the Redwoods to get a Thyla and I was on my Baryonx and a Castoroide showed up and when I started attacking it then my Baryonx ran away and left me to deal with it.
If you loot their dams you will get a TON of cementing paste, that is if you are able to get close enough without being torn to shreds...
Trap it in a box build of railings with a gate, then shoot it from the outside it worked for me.
Any crops are suggested. These guys can be even tamed when low-level, about the point in your levels 20+.
If you want to tame via crops they prefer the corn! Vote up for people to see!
You can find these guys at or around a river with a beaver dam.