Skeletal Terrorbird Secret
Skeletal Terrorbird earns $750M/s at base. With Rainbow (×3.5) it earns $2.63B/s, before size.
It ranks #34 of 191 pets by base income and #3 of 32 Secret pets.
Data checked: Oct 15, 2026 · Base weight: 6,000 kg · Egg: Skeletal Egg
Income by mutation
| Mutation | Multiplier | Income | How it appears |
|---|---|---|---|
| None | ×1 | $750M/s | Normal hatch |
| Rainbow | ×3.5 | $2.63B/s | Hatch roll, 1% chance |
| Parasite | ×3 | $2.25B/s | Event or item only |
| Fractured | ×2.75 | $2.06B/s | Event or item only |
| Scrambled | ×2.75 | $2.06B/s | Event or item only |
| Golden | ×2.5 | $1.88B/s | Hatch roll, 4% chance |
| Spirit Bloom | ×2.5 | $1.88B/s | Event or item only |
| Bloom | ×1.25 | $938M/s | Event or item only |
| Silver | ×1.2 | $900M/s | Hatch roll, 6% chance |
Income by size
Skeletal Terrorbird's base weight is 6,000 kg (community wiki). Heavier pets earn more, with diminishing returns past 125× the base weight; lighter-than-base pets earn less. The table uses the curve from the community wiki calculator.
| Weight | vs base | Size multiplier | No mutation | Rainbow | Golden | Silver |
|---|---|---|---|---|---|---|
| 3,000 kg | 0.5× | ×0.31 | $236M/s | $827M/s | $591M/s | $283M/s |
| 6,000 kg | 1× | ×1 | $750M/s | $2.63B/s | $1.88B/s | $900M/s |
| 12,000 kg | 2× | ×1.53 | $1.15B/s | $4.02B/s | $2.87B/s | $1.38B/s |
| 30,000 kg | 5× | ×2.7 | $2.02B/s | $7.08B/s | $5.06B/s | $2.43B/s |
| 60,000 kg | 10× | ×4.14 | $3.1B/s | $10.9B/s | $7.76B/s | $3.72B/s |
| 300,000 kg | 50× | ×11.16 | $8.37B/s | $29.3B/s | $20.9B/s | $10B/s |
| 750,000 kg | 125× | ×19.64 | $14.7B/s | $51.5B/s | $36.8B/s | $17.7B/s |
| 3,000,000 kg | 500× | ×34.19 | $25.6B/s | $89.8B/s | $64.1B/s | $30.8B/s |
Colour variants and mutations add together rather than multiply: Rainbow (×3.5) plus Parasite (×3) is ×5.5, not ×10.5.
Open Skeletal Terrorbird in the calculator to try any mutation, size and number of pets.
Closest pets by base income
| Pet | Rarity | Base income | vs Skeletal Terrorbird |
|---|---|---|---|
| Gorilla King | Eternal | $880M/s | 1.17× |
| Eyeball Crab | Secret | $825M/s | 1.10× |
| Shattered Drake | Eternal | $800M/s | 1.07× |
| Skeletal Terrorbird | Secret | $750M/s | – |
| Terra Snapper | Eternal | $750M/s | 1.00× |
| Mecha Crocodon | Monster | $680M/s | 0.91× |
| Ember Dragon | Secret | $600M/s | 0.80× |
Source: Module:IncomeCalculator/Data (rev 2021, Sep 30, 2026), Mutations (rev 1822, Sep 20, 2026), Pets and Eggs (rev 2161, Oct 14, 2026), MediaWiki:Common.js (rev 1790, Sep 20, 2026) · Steal An Egg community wiki, CC BY-SA 3.0. Numbers restructured into tables.