This addon will add a natural spawn system to both mobs and plants from Unusual Prehistory 2 mods that exist on their respective biome.

List of Mobs biome

Carnotaurus - Savanna, Badlands
Diplocaulus - Swamp, Mangrove Swamp
Dromaeosaurus - Plains, Forests
Dunkleosteus - Warm Ocean, Lukewarm Ocean
Jawless Fish - Warm Ocean, Lukewarm Ocean
Kentrosaurus - Plains, Jungle, Savanna, Forests
Kimmeridgebrachypteraeschnidium - Swamp, Beach
Majungasaurus - Jungles, Beach
Megalania - Savanna
Metriorhynchus - Warm Ocean, Lukewarm Ocean
Onchopristis - Rivers
Stethacanthus - Warm Ocean, Lukewarm Ocean
Talpanas - Dark Forest, Lush Caves, Beach
Tartuosteus - Warm Ocean, Lukewarm Ocean, Deep Ocean, Deep Lukewarm Ocean, Ocean
Telecrex - Plains, Meadow, Savanna
Kaprosuchus - Savanna
Desmatosuchus - Swamp
Lystrosaurus - Swamp
Pachycephalosaurus - Badlands
Psilopterus - Savanna
Leptictidium - Desert, Badlands
Ulughbegsaurus - Plains, Beach
Coelacanthus - Deep Ocean
Lobe Finned Fish - River
Hibbertopterus - Swamps
Pterodactylus - Caves, Beach
Brachiosaurus - Sparse Jungle, Beach
Praepusa - Frozen Ocean, Snowy Beach
Aegirocassis - Deep Ocean
Mosasaurus - Deep Ocean

List of Plants biome

Gingko - Forests
Lepidodendron - Swamps
Bennettitales - Badlands, Deserts
Calamophyton - Swamps
Cladophlebis - Swamps, Forests, Jungles
Cooksonia - Meadow, Plains
Horsetail - Swamps, Forests, Jungles
Giant Horsetail - Swamps, Forests, Jungles
Leefructus - Swamps, Forests, Jungles, Plains
Moss Layer - Swamps
Quillwort - Swamps, Rivers
Raiguenrayun - Sunflower Plains
Rhynia - Swamps, Beach
Aethophylllum - Jungles, Swamp
Archaeosigillaria - Swamp
Brachyphyllum - Old Growth Taiga, Swamp
Neomariopteris - Badlands, Desert
Tempskya - Old Growth Taiga
Delitzschala Stalk - Swamps
Zhangsolva Bloom - Sunflower Plains

This addon is also compatible with:
Windswept
Spawn
Environmental
Atmospheric
Nature's Spirit
Biomes O' Plenty
Oh the Biomes We've Gone
Region Unexplored

Special Thanks to:
Unusual Prehistory 2 Team for creating the mod
Platypus, for helping and tweaking the spawn system

If you found any problem or bugs, please report to the comment section or discord server

Unusual Spawning