Playable animals

Ancient Bison

Herd herbivore unlocked by marking a predator. Charge, joust, and migrate.

Ancient Bison in Ecos: La Brea

Ancient Bison: Herd herbivore unlocked by marking a predator. Charge, joust, and migrate. Get it by Unlock the badge by marking a predator. The animal guide says to do that as a Western Horse. Read settings for the mark key. New players default to Q after the January 23, 2026 note. Use it to Stay with the herd on…

What is Ancient Bison?

Ancient Bison move with migration zones in maternal bands and bachelor herds on the official natural-history note. In game they herd, graze, joust for rank, charge at full speed, and headbutt at short range. They get a quick turn while running. Y challenges another player to a duel, and winning one is a bison-only Track mission. The charge is much weaker if you are alone in broken terrain.

Published facts

Ancient Bison facts
FactValue
Scientific nameBos bison antiquus
DietMixed feeder with more woody browse than a plains bison comparison
Group size20
Estimated mass570-950 kg
Shoulder height185-227 cm
Default coatPlains, free
UnlockMark a predator as a Western Horse

How do you get Ancient Bison?

Unlock the badge by marking a predator. The animal guide says to do that as a Western Horse. Read settings for the mark key. New players default to Q after the January 23, 2026 note.

How do you use Ancient Bison?

Stay with the herd on open ground. Use the charge at full speed and the headbutt when something is already in front of you. Duel other bison with Y when you want the duel mission or herd rank. Do not expect flee-mode speed to match a horse.

FAQ

Ancient Bison questions

Is Ecos: La Brea free?

Yes. The official Free to Play video says the experience became free to play on Roblox on November 22, 2025. Open the Ecos Team game page and press play. Older pages that still say the game costs Robux describe an earlier access period.

Which animals can I play right now?

The Roblox game description names Dire Wolf, Saber-tooth Cat, Ancient Bison, Western Horse, and Columbian Mammoth. Horse and Dire Wolf are the animals used in the published unlock steps for the others. Smilodon, Ancient Bison, and Columbian Mammoth have their own badges. Orcutt's Coyote and Harington's Pony were announced on June 29, 2026 as upcoming playables after the emotes update. October 2026 community clips describe them on testing servers, and a public unlock quest for them was not documented.

Are there working codes?

No code string was confirmed as active for October 2026, and a code-entry button was not confirmed in the game. Tracks, the coat currency, are earned by missions, Instincts, survival, and territory or migration play. Do not enter passwords or payment details into any box that claims to be a code field.

How do I unlock the Saber-tooth Cat, Ancient Bison, and Mammoth?

The Saber-tooth Cat badge is earned by hunting and killing a Peccary. The Ancient Bison badge is earned by marking a predator, which the animal guide describes doing as a Western Horse. The Columbian Mammoth badge is earned by completing the mammoth quest: interact with a mammoth skeleton so fossil zones appear, then collect the fossils in those zones. Video pin lists are examples, because players report the marked spots are not one permanent map.

What are Tracks?

Tracks are the currency used to buy animal coats. The published shop ladder is Default free, Tier 1 at 300, Tier 2 at 500, Tier 3 at 1000, and Tier 4 at 3000. Some mutation coats are listed at other prices, including 395. Repeating carnivore and herbivore missions have about a one-hour cooldown. Territory, migration, and the separate daily Instinct board do not use that same hour lock.