Steal an Egg · Pet
Terrorbird
Terrorbird is a Mythic pet in Steal an Egg that earns a base $110K/s. It hatches from the Terrorbird Egg (Skeletal Egg).
Pet stats
Base income
$110K/s
Base weight
6,000 kg
Egg
Terrorbird Egg
Grow time
—
Speed reward
—
Cash reward
—
Source
Skeletal Egg
Special egg
Rarity
Mythic
Where to get Terrorbird
Terrorbird hatches from the Terrorbird Egg, part of the Skeletal Egg group. According to the wiki, limited eggs like this do not spawn in the regular biome nests: they come from the Store or from special events such as Admin Abuse.
Estimate based on the wiki formula
Terrorbird income with mutations and size
| Mutation | 1× weight6,000 kg | 10× weight60,000 kg | 100× weight600,000 kg | 200× weight1,200,000 kg |
|---|---|---|---|---|
| No mutation×1 | $110K/s | $455K/s | $1.88M/s | $2.61M/s |
| Rainbow×3.5 | $385K/s | $1.59M/s | $6.59M/s | $9.12M/s |
| Parasite×3 | $330K/s | $1.37M/s | $5.65M/s | $7.82M/s |
| Fractured×2.75 | $303K/s | $1.25M/s | $5.18M/s | $7.17M/s |
| Scrambled×2.75 | $303K/s | $1.25M/s | $5.18M/s | $7.17M/s |
| Golden×2.5 | $275K/s | $1.14M/s | $4.71M/s | $6.52M/s |
| Spirit Bloom×2.5 | $275K/s | $1.14M/s | $4.71M/s | $6.52M/s |
| Bloom×1.25 | $138K/s | $569K/s | $2.35M/s | $3.26M/s |
| Silver×1.2 | $132K/s | $546K/s | $2.26M/s | $3.13M/s |
Estimate based on the wiki formula (marked beta there): income = base × (weight ÷ base weight)^(37/60) × mutation, with diminishing returns above 125× the base weight. In-game values can differ. See mutations and the income calculator.
How Terrorbird compares
Neighbors by income in Skeletal Egg (1 of 10):
Earns more
Giant Sloth
$4M/s(×36 vs Terrorbird)
Other Mythic pets
Terrorbird guide
Terrorbird opens the extinct-animal line-up that Update 6 added. At $110K/s it is the lowest earner in the group the wiki files under the Skeletal Egg, and its own Skeletal form, Skeletal Terrorbird, makes $750M/s.
How the extinct animals are obtained
Update 6 introduced the Extinction Egg, a paid egg with 6 new extinct animals. Each hatch has a small chance to re-roll, and a re-roll turns the result into a rare Skeletal version of that animal. The wiki's pet table puts Terrorbird in its Skeletal Egg group together with the Skeletal variants, while the Extinction Egg entry itself only names Glyptodon and Sabertooth, so the exact egg label for Terrorbird isn't spelled out. What is clear is that this is a store-side egg, not a biome nest: no Speed requirement, no guardian. The wiki also has no grow time or hatch reward for it.
The group, from lowest to highest:
- Terrorbird, Mythic, $110K/s
- Giant Sloth, Cosmic, $4M/s
- Dunkleosteus, Secret, $300M/s
- Skeletal Glyptodon, Skeletal Terrorbird, Skeletal Giant Sloth (Secret, $550M to $900M/s)
- Gigantus, Skeletal Dunkleosteus, Skeletal Gigantus (Eternal, $1B to $4B/s)
- Skeletal Sabertooth, Divine, $9B/s
On the heavy side for a Mythic
Terrorbird's base weight is 6,000 kg, more than most Mythic pets (Wheel Hamster is listed at 4 kg), though Toro and Winged Lamb go far higher. It ranks 13th of 23 Mythic pets, and 134 of 198 pets earn more. Estimates with the formula the wiki documents:
- Golden: about $275K/s
- Rainbow: about $385K/s
- 10x base weight: about $455K/s
- 100x base weight: about $1.88M/s
- Rainbow at 100x weight: about $6.59M/s
The Skeletal re-roll is worth about 6,800 times the plain pet, so a plain Terrorbird is mostly the consolation prize of this egg.
Data sourced from the Steal an Egg Wiki (CC BY-SA) and processed automatically; last synced 2026-10-11.