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These values may differ with what you see in-game or written elsewhere. But that is what the dossier says.
Common Name
Castoroides feliconcisor
Time Period
Late Pliocene - Late Pleistocene
Logo Steam.png 236.0
February 24, 2016
Logo Xbox One.svg 732.0
March 7, 2016
Logo PS4.svg 501.0
December 6, 2016
Logo Mobile.svg 1.0
May 24, 2018
Logo Nintendo Switch.png 599.0
November 30, 2018
Spawn Command
admincheat summon Beaver_Character_BP_C
admincheat SpawnDino "Blueprint'/Game/PrimalEarth/Dinos/Beaver/Beaver_Character_BP.Beaver_Character_BP'" 500 0 0 35
XP For Kill
8 XP
Gestation Time
7h 56m
Baby Time
6h 10m
Juvenile Time
1d 41m
Adolescent Time
1d 6h 51m
Total Maturation Time
2d 13h 43m 42s
Breeding Interval
18h - 1d 15h 40m

The Island Topographic Map.jpg
Spawning Castoroides The Island.svg

Extinction Topographic Map.jpg
Spawning Castoroides Extinction.svg

The Center Topographic Map.jpg
Spawning Castoroides The Center.svg

Ragnarok Ocean Topographic Map.jpg
Spawning Castoroides Ragnarok.svg

Common             Rare
  Untameable   Cave

The Castoroides (cass-tor-oy-dees) or Giant Beaver is one of the creatures in ARK: Survival Evolved.

Basic Info[edit | edit source]

Dossier[edit | edit source]

This dossier section is intended to be an exact copy of what the survivor Helena, the author of the dossiers has written. There may be some discrepancies between this text and the in-game creatures.


Castoroides is a large, mammalian herbivore that tends to live near water. Unlike other larger beaver species this one retains the chisel-shaped teeth of modern beavers. As is typical for beavers, they build dams as habitats, but the larger creatures on the island have a tendency to trample them. As a result, finding unsullied dams in the wild is quite rare.

Castoroides itself doesn't seem to realize how dangerous the island is. I don't know if it's simply too dumb to notice the dangers, or if it just doesn't care...but Castoroides happily goes about its day playing in the water and gnawing on wood.


The value of a tamed Castoroides is obvious from its physiology. The creature naturally gathers wood extremely efficiently, far more than most species on the island. It's not the strongest creature, so it can only carry limited amounts, but it is a natural lumberjack!

~ Helena

Behavior[edit | edit source]

Wild Castoroides will build dams containing large quantities of Wood.png Wood, Cementing Paste.png Cementing Paste, Rare Flower.png Rare Flower, Rare Mushroom.png Rare Mushroom, and Silica Pearls.png Silica Pearls. Giant Beavers are very protective of their dams and will come to their defense should anyone threaten them. One to three beavers have been noted around a dam site. See Giant Beaver Dam.png Giant Beaver Dam for a map of locations. The dams will never be re-filled, be sure to destroy them after looting.

Castoroides will not attack any entity (whether it be player or creature) unless aggravated to do so. Often, Giant Beavers who reside close to swamps will be forced to defend their territory and fight against wandering Dilophosaurs and invading Titanoboas. Sometimes they can be seen grouping up against larger predators like Carnos or swarms of smaller predators like Raptors and Terror Birds. If a player attacks one, the entire Giant Beaver population in the immediate area will attack. Unless injured by the player, a player can get as close as they would like to a Giant Beaver. If the ability to kill a Beaver in a single hit by a powerful mount is available, doing so will not make the other Beavers attack.

Appearance[edit | edit source]

The Castoroides is a giant species of beaver found commonly in the rivers and ponds of the island's interior. It also appears at the Hidden Lake. It has waterproof fur and a flat tail for swimming. With their powerful jaws and sharp incisors they can gnaw through many of the trees found throughout the island, using the resulting wood and other raw materials to construct their dams.

Color Scheme and Regions

This section displays the Castoroides's natural colors and regions. For demonstration, the regions below are colored red over an albino Castoroides. The colored squares shown underneath each region's description are the colors that the Castoroides will randomly spawn with to provide an overall range of its natural color scheme. Hover your cursor over a color to display its name and ID.

Server admins can use this region information in the Console Command "cheat SetTargetDinoColor <ColorRegion> <ColorID>".
For example, "cheat SetTargetDinoColor 0 6" would color the Castoroides's "body" magenta.

Castoroides PaintRegion0.jpg
Region 0:
Castoroides PaintRegion1.jpg
Region 1:
X mark.svg

Region 2 is not used
for this Creature.

X mark.svg

Region 3 is not used
for this Creature.

Castoroides PaintRegion4.jpg
Region 4:
Castoroides PaintRegion5.jpg
Region 5:

Drops[edit | edit source]

Base Stats and Growth[edit | edit source]

Note that creatures will have different stats in Survival of the Fittest

Basic Stats
Attribute Amount at Level 1 Increase per point Taming Bonus
Wild Domesticated1 Add Mult
Health.png Health 450 +90 +5.4% 0.07
Stamina.png Stamina 180 +18 +10%
Oxygen.png Oxygen 750 +75 +10%
Food.png Food 2000 +200 +10%
Weight.png Weight 300 +6 +4%
Melee Damage.png Melee Damage 282 +1.12 +1.7% 7% 17.6%
Movement Speed.png Movement Speed 100% N/A3 +1% 70%
Torpidity.png Torpidity 350 +21 N/A4 0.5

1Percentages are based on the value of the stat the moment the creature was tamed (after taming effectiveness)
2The absolute Base Damage is shown here instead of the percentage.
3Wild creatures do not level up movement speed
4Torpidity increases every level on wild creatures, but can not be increased once they are tamed.

Movement Speed
Movement Type Base Speed Sprinting Stamina Used
Wild Domesticated
Walking 160 561.6 432 5
Swimming 700 N/A N/A N/A

Attack Values
Melee Stamina Cost Attack Range Description
Base Minimum Activation Using the Left Mousebutton (PC), R2 Button (PS4), RT Button (Xbox One), the Castoroides bites the target.
0 250 0 0
Attack Type Damage Projectile Values Torpor Values Status Effect: Stamina Status Effect: Torpidity
Life Impulse Radius Base Mult Duration Damage Mult Amount Duration Damage Mult Amount
Melee 28

Wild Stats Level-up

Type in values of a wild creature to see on which stats it's emphasized. Green values on a high-level creature are very good for breeding. If you have already tamed your creature you can try to recover the breeding-stats with an external tool.[1]


The stat-calculator does not work in the mobile-view, see here for alternatives: Apps

Note that after the creature is tamed it gets bonuses on some stats depending on the taming effectiveness. This makes it hard to retrieve the levels on a tamed creature, so this tool is only for wild ones, but gives a first impression, how well the stats are distributed.

Taming[edit | edit source]

For general infos about domesticating a wild creature see Taming.

KO Strategy[edit | edit source]

The Beavers are not hard to down, as it only takes around 9 tranquilizer darts to down a lvl 75, so just using darts while it's chasing you should work fine. You may also put it in a small taming pen or use Bolas on it. The Beavers torpor drops very rapidly so it is very important to fire tranquilizers in rapid succession and have a lot of narcotics on hand, as the tame is long and slow.

Taming Food[edit | edit source]

Giant Beaver.png Level 1 Narcoberry Narcotic Bio Toxin Time
Kibble.png Kibble (Gallimimus Egg) 3 52 12 6 0:10:48
Advanced Crops.png Vegetables 27 336 78 39 0:48:37
Mejoberry.png Mejoberry 35 326 76 38 0:47:16
Berries.png Berries 53 329 76 38 0:47:43
Fresh Sugar Plant (Primitive Plus).png Fresh Sugar Plant Primitive Plus Icon.png 2 0 0 0 0:00:06
KO: Wooden Club Hits × 35; Slingshot Hits × 15; Tranquilizer Arrows with a Bow × 4; Tranquilizer Arrows with a Crossbow × 3; Toxicant Arrows with a Bow × 2; Tranquilizer Dart Shots × 2; Shocking Tranquilizer Dart Shots × 1
Torpidity-depletion: 1.5 / s, Time until all torpidity is depleted: 00:03:53
Giant Beaver.png Level 30 Narcoberry Narcotic Bio Toxin Time
Kibble.png Kibble (Gallimimus Egg) 7 188 47 24 0:25:12
Advanced Crops.png Vegetables 63 1069 267 134 1:53:25
Mejoberry.png Mejoberry 84 1069 267 134 1:53:25
Berries.png Berries 125 1060 265 133 1:52:31
Fresh Sugar Plant (Primitive Plus).png Fresh Sugar Plant Primitive Plus Icon.png 5 0 0 0 0:00:14
KO: Wooden Club Hits × 96; Slingshot Hits × 40; Tranquilizer Arrows with a Bow × 11; Tranquilizer Arrows with a Crossbow × 7; Toxicant Arrows with a Bow × 6; Tranquilizer Dart Shots × 5; Shocking Tranquilizer Dart Shots × 3
Torpidity-depletion: 2.5 / s, Time until all torpidity is depleted: 00:06:24
Giant Beaver.png Level 60 Narcoberry Narcotic Bio Toxin Time
Kibble.png Kibble (Gallimimus Egg) 10 315 83 42 0:35:59
Advanced Crops.png Vegetables 100 1944 508 254 3:00:01
Mejoberry.png Mejoberry 134 1954 511 256 3:00:55
Berries.png Berries 200 1944 508 254 3:00:01
Fresh Sugar Plant (Primitive Plus).png Fresh Sugar Plant Primitive Plus Icon.png 7 0 0 0 0:00:19
KO: Wooden Club Hits × 159; Slingshot Hits × 65; Tranquilizer Arrows with a Bow × 18; Tranquilizer Arrows with a Crossbow × 11; Toxicant Arrows with a Bow × 9; Tranquilizer Dart Shots × 8; Shocking Tranquilizer Dart Shots × 4
Torpidity-depletion: 3.26 / s, Time until all torpidity is depleted: 00:08:08
Giant Beaver.png Level 90 Narcoberry Narcotic Bio Toxin Time
Kibble.png Kibble (Gallimimus Egg) 14 502 136 68 0:50:23
Advanced Crops.png Vegetables 138 2923 790 395 4:08:25
Mejoberry.png Mejoberry 184 2923 790 395 4:08:25
Berries.png Berries 275 2912 787 394 4:07:31
Fresh Sugar Plant (Primitive Plus).png Fresh Sugar Plant Primitive Plus Icon.png 10 0 0 0 0:00:28
KO: Wooden Club Hits × 222; Slingshot Hits × 91; Tranquilizer Arrows with a Bow × 25; Tranquilizer Arrows with a Crossbow × 15; Toxicant Arrows with a Bow × 13; Tranquilizer Dart Shots × 11; Shocking Tranquilizer Dart Shots × 6
Torpidity-depletion: 3.94 / s, Time until all torpidity is depleted: 00:09:24
Giant Beaver.png Level 120 Narcoberry Narcotic Bio Toxin Time
Kibble.png Kibble (Gallimimus Egg) 18 704 195 98 1:04:46
Advanced Crops.png Vegetables 175 3939 1092 546 5:15:01
Mejoberry.png Mejoberry 234 3950 1095 548 5:15:55
Berries.png Berries 350 3939 1092 546 5:15:01
Fresh Sugar Plant (Primitive Plus).png Fresh Sugar Plant Primitive Plus Icon.png 12 0 0 0 0:00:33
KO: Wooden Club Hits × 285; Slingshot Hits × 117; Tranquilizer Arrows with a Bow × 32; Tranquilizer Arrows with a Crossbow × 19; Toxicant Arrows with a Bow × 16; Tranquilizer Dart Shots × 13; Shocking Tranquilizer Dart Shots × 7
Torpidity-depletion: 4.58 / s, Time until all torpidity is depleted: 00:10:23
Giant Beaver.png Level 150 Narcoberry Narcotic Bio Toxin Time
Kibble.png Kibble (Gallimimus Egg) 22 917 260 130 1:19:10
Advanced Crops.png Vegetables 213 5020 1420 710 6:23:25
Mejoberry.png Mejoberry 284 5020 1420 710 6:23:25
Berries.png Berries 425 5008 1417 709 6:22:31
Fresh Sugar Plant (Primitive Plus).png Fresh Sugar Plant Primitive Plus Icon.png 15 0 0 0 0:00:41
KO: Wooden Club Hits × 348; Slingshot Hits × 142; Tranquilizer Arrows with a Bow × 39; Tranquilizer Arrows with a Crossbow × 23; Toxicant Arrows with a Bow × 20; Tranquilizer Dart Shots × 16; Shocking Tranquilizer Dart Shots × 8
Torpidity-depletion: 5.18 / s, Time until all torpidity is depleted: 00:11:12

Note that the values are for optimal cases, always bring extra supplies!
For a level-dependent count of resources needed, try an external taming calculator.

Ingredients for Kibble.png Kibble (Gallimimus Egg): 1 × Gallimimus Egg.png Gallimimus Egg , 1 × Savoroot.png Savoroot , 1 × Cooked Meat Jerky.png Cooked Meat Jerky , 2 × Mejoberry.png Mejoberry , 3 × Fiber.png Fiber , 1 × Water.png Water

Preferred Food[edit | edit source]

  1. Kibble.png Kibble (Gallimimus Egg)
  2. Advanced Crops.png Vegetables
  3. Mejoberry.png Mejoberries

Combat[edit | edit source]

This section describes how to fight against the Castoroides.

General[edit | edit source]

Giant Beavers are actually very tough and deadly animals both in the water and out. They are surprisingly fast, and they do a lot of damage. Beware!

Strategy[edit | edit source]

Staying away and out of water can make the Castoroides an easy creature to knockout along with their decently low torpor, but need a fair amount of narcotics.You can walk backwards to avoid damage, but they will eventually catch up to you. Whatever you do, do not go in the water with an angry Giant Beaver, or it will likely kill you in seconds. If just trying to outright kill it, try using bolas and attacking from the sides or back with melee.

Weaponry[edit | edit source]

Depending on the distance, use any ranged or any melee weapon to kill them. They are vulnerable to Bolas, which can make them an easy kill.

Dangers[edit | edit source]

They are surprisingly fast and capable of killing a Megalodon in a straight biting match. They become aggressive when attacked or their den is ransacked. Beware when looting the dens!

Weakness[edit | edit source]

When unmounted, the beaver will float up to the surface unless they are following you. They cannot climb very well, so height might help a player in trouble.

Utility[edit | edit source]

Roles[edit | edit source]

  • Gatherer: Castoroides gather wood very efficiently. While this is much easier when ridden, players without a Castoroides saddle can still take advantage of the wood-gathering ability by enabling the Castoroides to wander in a wooded area. It will gather wood on its own when it wanders near trees until it reaches 50% weight. For more immediate wood gathering without a saddle, the player can manually lead the Castoroides to trees by whistling for it to follow, leading it to a tree, then whistling it to stop. If the Castoroides is close enough, it will cut down the tree and collect the wood. Repeating this process can quickly gather lots of wood with minimal effort (Level up Weight and Melee Damage).
  • Transport: Wood.png Wood, Thatch.png Thatch, Fiber.png Fiber and Stone.png Stone weigh less while being carried by the Castoroides. These resources weigh only 50% of their usual value (25, 1, 0.5, and 25 units per 100 pieces respectively). The Castoroides travels faster while swimming in many of ARK's waterways, making transport through rivers much more viable (Level up Weight, Stamina).
  • Organic Craftsman: Once saddled, the Castoroides can be used as a Smithy, allowing for a mobile crafting wagon.(Level up Weight).
  • Deep Sea Diver: The Castoroides has both an oxygen stat and the ability to breathe underwater. Raising the oxygen stat makes it swim faster. Being stronger than a dire wolf, it can defend itself if necessary against Megalodons. Fighting sea creatures should only be initiated if the Castoroides has a good saddle. Due to being a mobile smithy, it is great to go into underwater caves as these usually have resources for most items made in the smithy. However, Castoroides will rise up to the surface if they are dismounted unless they are set to following you. (Level up Oxygen, Weight and few points in Melee)
  • Resource Duo Strategy: If you have an Argentavis, it can be paired with the Castoroides to make a nice combo for wood gathering. You can carry the Castoroides with the Argentavis to a dense wood area, clear it out, and, as the Castoroides has a wood weight reduction, you can carry big amounts of resources with the Argentavis back to your base. This seems to be the most efficient way to gather wood.

Weight Reduction[edit | edit source]

The Castoroides reduces the weight of the following resources by the listed amount while they are in its inventory:

Resource Reduction by
Fiber.png Fiber 50%
Stone.png Stone 50%
Thatch.png Thatch 50%
Wood.png Wood 50%

Collectibles[edit | edit source]

Castoroides will gather wood autonomously while on wander or if set to do nothing while a tree is very close to it.

Resource Efficiency
Wood.png Wood ★★★★★
Gathers autonomously
Berries.png Berries ★★★☆☆
Thatch.png Thatch ★★☆☆☆
Castoroides will automatically cut trees when near them.

Spotlight[edit | edit source]

Notes/Trivia[edit | edit source]

For information pertaining specifically to the real-world Castoroides, see the relevant Wikipedia article

  • First revealed by Jat on 06/20/2015 [1]
  • Before the introduction of the Direbear.png Direbear and the Redwood Forests with an additional spawn area of the Megaloceros.png Megaloceros, hunting Castoroides was the easiest way to gather Pelt.png Pelt without entering the tundra. Keep in mind that these mammals are rather rare, however, and may be worth more alive than dead.
  • In real life, Casteroides' incisors were much broader and thicker than modern beavers, so they would have been less effective at cutting wood. For this reason, many paleontologists believe they did not construct dams.
  • The Castoroides has an oxygen attribute, but it never drains when the beaver is underwater. Thus, beavers are incapable of drowning.
  • When riding a Castoroides in first person view, the camera is placed slightly behind where it should be as you can clearly see its saddle.
  • A map of giant beaver dam spawn locations can be seen in the article Giant Beaver Dam. These locations are also where to search for beavers as beavers spawn in pairs around the dams.

Gallery[edit | edit source]

References[edit | edit source]