Steal An Egg Index

Steal An Egg Prehistoric: Eggs, Pets & Speed

Zone 8 of 14 · 8 pets · wiki data synced Oct 24, 2026

You need 17M – 18M Speed to enter Prehistoric, and its guardian is the T-Rex.

8 egg types spawn here. The most common is Dodo (39.1%); the rarest is Mosasaurus (Eternal, 1 in 321).

An average Prehistoric egg hatches into a pet worth $1.27M/s at base size.

All eggs in Prehistoric

Dodo Egg in Steal An Egg Dodo Egg Dodo · 39.066058% Pterodactyl Egg in Steal An Egg Pterodactyl Egg Pterodactyl · 26.044039% Ankylosaurus Egg in Steal An Egg Ankylosaurus Egg Ankylosaurus · 20.835231% Bronto Egg in Steal An Egg Bronto Egg Bronto · 6.995959% Triceratops Egg in Steal An Egg Triceratops Egg Triceratops · 4.929402% T-Rex Egg in Steal An Egg T-Rex Egg T-Rex · 0.991743% Tralaledon Egg in Steal An Egg Tralaledon Egg Tralaledon · 0.826453% Mosasaurus Egg in Steal An Egg Mosasaurus Egg Mosasaurus · 0.311113%
PetRarityBase $/sChanceEggs for 50%Eggs for 90%
Dodo in Steal An EggDodoRare$280/s 39.1%25
Pterodactyl in Steal An EggPterodactylLegendary$22K/s 26%38
Ankylosaurus in Steal An EggAnkylosaurusMythic$120K/s 20.8%310
Bronto in Steal An EggBrontoCosmic$1.5M/s 7%1032
Triceratops in Steal An EggTriceratopsCosmic$1.2M/s 4.93%1446
T-Rex in Steal An EggT-RexSecret$25M/s 0.99% (1 in 101)70232
Tralaledon in Steal An EggTralaledonSecret$32M/s 0.83% (1 in 121)84278
Mosasaurus in Steal An EggMosasaurusEternal$180M/s 0.31% (1 in 321)223739

"Eggs for 50%": how many Prehistoric eggs you need to see for an even chance of at least one of that pet. It uses the wiki's spawn chances: 1 − (1 − p)n.

Speed to reach Prehistoric and the next zone

Before it: Abyss Ocean (2.5M Speed). Next: Cosmic needs 700M Speed. Speed comes from treadmills and trails: see treadmill and trail prices or the full Speed ladder.

Source: Prehistoric on the Steal An Egg Wiki (CC BY-SA). Synced Oct 24, 2026.