Pet
Bronto
Bronto is a Cosmic-rarity pet from the Prehistoric zone in Steal an Egg, hatched from the Bronto Egg, with a listed base income of $1.5M/s.
| Rarity | Cosmic |
|---|---|
| Zone | Prehistoric |
| Egg | Bronto Egg |
| Income | $1.5M/s |
| Hatch reward | +300k Speed, $150m |
| Grow time | 11m |
| Zone speed needed | ~17M–18M |
| Zone guardian | T-Rex |
| Wiki data as of | 2026-09-04 |
Bronto (Cosmic rarity) belongs to the Prehistoric zone. Prehistoric is zone 8 of 11 on the normal route; the wiki lists its entry requirement as ~17M–18M speed, and the nests there are watched by the T-Rex. You get it by carrying the Bronto Egg back to your pen.
At $1.5M/s base income, Bronto sits 4th out of 8 in its zone — Mosasaurus tops the Prehistoric at $180M/s. The listed figure assumes no mutation and a normal weight.
With a colour mutation and no size bonus, the same Bronto would earn roughly: Silver ×1.2 ≈ $1.80M/s, Golden ×2.5 ≈ $3.75M/s, Rainbow ×3.5 ≈ $5.25M/s (multipliers from the wiki's Mutations page; arithmetic is ours). Add a Giant (×3) or Huge (×5) size roll on top and the numbers multiply again.
Hatching it pays a one-off reward of +300k Speed, $150m, and the egg takes 11m to grow in the pen. That reward is the reason low-income eggs are still worth stealing early: the speed bonus is what gets you into the next zone.
Cosmic-rarity pets sit near the top of their zone's table; expect the nest to be contested on busy servers.
Sources & further reading
Other pets
- Mosasaurus
Mosasaurus is a Eternal-rarity pet from the Prehistoric zone in Steal an Egg, hatched from the Mosasaurus Egg, with a listed base income of $180M/s.
- Tralaledon
Tralaledon is a Secret-rarity pet from the Prehistoric zone in Steal an Egg, hatched from the Tralaledon Egg, with a listed base income of $32M/s.
- T-Rex
T-Rex is a Secret-rarity pet from the Prehistoric zone in Steal an Egg, hatched from the T-Rex Egg, with a listed base income of $25M/s.
- Triceratops
Triceratops is a Cosmic-rarity pet from the Prehistoric zone in Steal an Egg, hatched from the Triceratops Egg, with a listed base income of $1.2M/s.
- Ankylosaurus
Ankylosaurus is a Mythic-rarity pet from the Prehistoric zone in Steal an Egg, hatched from the Ankylosaurus Egg, with a listed base income of $120K/s.
- Pterodactyl
Pterodactyl is a Legendary-rarity pet from the Prehistoric zone in Steal an Egg, hatched from the Pterodactyl Egg, with a listed base income of $22K/s.
Pet names, rarities, zones, incomes, rewards and grow times derive from the Steal An Egg Wiki on Fandom, licensed CC BY-SA 3.0; this table is shared under the same licence. Read 2026-09-13. https://www.fandom.com/licensing
All pets: All Steal an Egg pets. Back to the Steal an Egg Hub home page.
Sukie · Editor
Sukie runs Steal an Egg Hub. Every pet, egg, zone and mutation on the site is checked against the Steal An Egg Wiki's infoboxes and the official Roblox game data before it is published, with the date it was read; anything the sources do not state is marked as not published rather than guessed.
About this site · How pages are checked · Last updated September 12, 2026
Steal an Egg Hub is an unofficial fan site. It is not affiliated with, endorsed by or associated with the 'and Collect Rare Pets' group or Roblox Corporation. Game names, images and trademarks belong to their owners.