EGG RECORD · PREHISTORIC · COSMIC
Bronto Egg (Steal An Egg)
Bronto Egg is a recorded Prehistoric egg with a top rarity of Cosmic. This page keeps the confirmed fields and the unknown values clearly separated.
Bronto Egg at a glance
Bronto Egg is a recorded egg from the Prehistoric area, with Cosmic as the highest recorded rarity in its contents. Its recorded result is Bronto, a Cosmic pet.
Pooled eggs are the part of this game that is easiest to misread. A single egg artwork can hide several pets with very different rarities, which is why this page lists the whole pool instead of a single headline value.
Bronto Egg quick facts
Where to find Bronto Egg
Bronto Egg belongs to the Prehistoric area. Reach that area with a route you can complete consistently, steal the egg, and return it to your base before hatching. If the Prehistoric route is still marginal at your current Speed, run a nearer area first and come back once the return leg is comfortable.
The return leg is what decides most attempts. Measure your own round trip, then add a buffer for a slower server. The egg itself does not change, but your chance of keeping it does.
Bronto Egg rarity
The highest recorded rarity in Bronto Egg is Cosmic. That is a label from the record, not a probability. It tells you how far into progression this egg belongs, not how many attempts a specific result will take.
If you are comparing two eggs, read the whole pool rather than the top rarity alone. An egg with one high-rarity entry and five weaker entries behaves very differently from an egg that is consistently strong across its pool.
Bronto Egg in this index
Inside the Prehistoric area, Bronto Egg ranks 4th of the 6 ranked Prehistoric records by the recorded Money/s of the pet behind it, behind T-Rex Egg and ahead of Triceratops Egg.
Its highest recorded rarity is Cosmic, a tier shared by 12 of the 97 egg records in this index.
Prehistoric eggs
These eggs share the Prehistoric area or the highest rarity of Bronto Egg. The table starts with the closest recorded value, and each row shows how far it sits from this record. Rows without a confirmed value come last and are not compared. Showing the 10 closest of 17 related records.
| Pet | Rarity | Biome | Money/s | Reward |
|---|---|---|---|---|
 Triceratops Egg | Cosmic | Prehistoric | $1.2m/s−$300k/s | +360k Speed / $120m |
 Beluga Whale Egg | Cosmic | Abyss Ocean | $850k/s−$650k/s | +126k Speed / $85m |
 La Vacca Saturno Saturnita Egg | Cosmic | Cosmic | $2.2m/s+$700k/s | +1.3m Speed |
 Whale Shark Egg | Cosmic | Abyss Ocean | $700k/s−$800k/s | +108k Speed / $70m |
 King Mammoth Egg | Cosmic | Snow | $400k/s−$1.1m/s | +22.4k Speed / $40m |
 Royal Sphinx Egg | Cosmic | Desert | $280k/s−$1.22m/s | +18k Speed / $28m |
 Leviathan Egg | Cosmic | Lake | $220k/s−$1.28m/s | +5k Speed / $22m |
 Ankylosaurus Egg | Mythic | Prehistoric | $120k/s−$1.38m/s | +330k Speed / $12m |
 Snowy Owl Egg | Cosmic | Cherry Blossom | $7.5m/s+$6m/s | +3.7m Speed / $750m |
 Mantaris Egg | Cosmic | Titan Temple | $11m/s+$9.5m/s | +3.4m Speed / $1.1b |
FAQ
Which pets hatch from Bronto Egg in Steal An Egg?+
Bronto Egg is recorded with Bronto as its linked pet, a Cosmic result from the Prehistoric area.
How rare is Bronto Egg?+
The highest recorded rarity in Bronto Egg is Cosmic. That label describes the recorded tier only; this page does not invent hatch probabilities.
Where does Bronto Egg come from?+
Bronto Egg belongs to the Prehistoric area. Steal it from that area, return it to your base, and hatch it to see the result in your own session.
Does Bronto Egg have a confirmed income value?+
The linked pet Bronto is recorded at $1.5m/s Money/s. Confirm the current value in-game before planning around it.
Source note
Facts marked as confirmed come from the official Roblox game listing or the creator group and were checked on September 3, 2026. Unknown mechanics, code rewards, pet values, and tier rankings are not inferred. Review all sources and confidence notes.