Note: Please use the original mod's INTENDED EXPERIENCE before using this mod (creating dinosaurs via revival process), as this is what the developers intended rather than natural spawning. note that this mod's spawns are not scientifically accurate and should not be used informatively.

Credit to the Fossils and Archaeology team for creating such an incredible mod!

Disclaimer: DO NOT ASK THE ORIGINAL FOSSILS AND ARCHAEOLOGY DEVELOPERS FOR ISSUES REGARDING THIS ADDON, they are not the people to ask for this type of issue!

This mod is a fairly basic addon to Fossils and Archaeology, specifically the 1.18.2 and 1.20.1 version, the mod's main premise is it allows prehistoric animals in Fossils and Archaeology to spawn naturally in the Minecraft world, unlike the base mod, where you must revive them via fossils. This mod is for those who do not want to go through such a tedious process, and simply want to explore their world and discover dinosaurs in that fashion.

Creatures spawn based on blocks, rather than biomes, meaning in theory, so long as any of these blocks are present, even in a modded biome, the creatures will spawn in said biomes.

Creatures DO NOT continuously spawn, and spawn based on terrain generation rather than actual mob spawning, meaning creatures will not spawn in pre-existing world chunks, however, they will spawn without issue in new chunks or new worlds.

Some mods that go excellently with this one:

William wyther's overhauled overworld

Terralith

Tectonic

Original mod: Fossils and Archeology: Revival - Minecraft Mods - CurseForge

Fossilized Spawns