The Frog Variant System determines which frog variant spawns in a given biome.
It's important to note that Swampier Swamps does not change the biomes where frogs naturally spawn. Just like in vanilla Minecraft, frogs will only spawn in Swamp and Mangrove Swamp biomes. To obtain other frog variants, you need to catch a tadpole and bring it to the desired biome, where it will grow into the corresponding variant.

The system checks each frog variant sequentially and assigns it to a biome if there is a match. Once a variant finds a valid biome, the selected variant will be used for spawning. If multiple variants share the same biome, the one that appears first in the check order will be selected.

The variants are checked in the following order:

1. White
2. Orange
3. Magenta
4. Light Blue
5. Yellow
6. Lime
7. Pink
8. Gray
9. Light Gray
10. Cyan
11. Purple
12. Blue
13. Brown
14. Green
15. Red
16. Black

If no matches are found inside the swampier swamps frog tags, the system falls back to the default configuration:

• #spawns_cold_variant_frogs (for cold biomes)
• #spawns_warm_variant_frogs (for warm biomes)
• If the biome is not on either list, the Temperate (Orange) Frog is selected as the default variant.

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In order to spawn a frog with a certain variant you simply need to specify the variant when using the summon command.
Here is an example on how a white frog can be spawned:
/summon minecraft:frog ~ ~ ~ {variant:"swampier_swamps:white_variant"}
For other variants (except the 3 vanilla ones) simply replace white with the color you want.
For the vanilla ones use the vanilla variants:

• minecraft:temperate - For the Orange Frogs
• minecraft:warm - For the Light Gray Frogs
• minecraft:cold - For the Green Frogs

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Below are the different frog variants and the biomes that determine their appearance when they grow up.

Vanilla Biomes

• Snowy Plains
• Snowy Taiga
• Grove
• Snowy Slopes
• Snowy Beach

Note: This is the minecraft:temperate frog, but with adjusted spawn biomes.

Vanilla Biomes

• Meadow
• Birch Forest
• Old Growth Birch Forest
• Swamp
• Beach
• Desert

Vanilla Biomes

• Mushroom Fields
• Cherry Grove

Vanilla Biomes

• Warm Ocean
• Ice Spikes

Vanilla Biomes

• Badlands
• Wooded Badlands
• Eroded Badlands
• Savanna
• Savanna Plateau
• Windswept Savanna

Vanilla Biomes

• Mangrove Swamp
• Lush Caves

Vanilla Biomes

• Flower Forest
• Sunflower Plains

Vanilla Biomes

• Windswept Gravelly Hills
• Stony Peaks
• Stony Shore
• Windswept Hills
• Windswept Forest

Note: This is the minecraft:warm frog, but with adjusted spawn biomes.

Vanilla Biomes

• Frozen Peaks
• Frozen River
• Jagged Peaks

Vanilla Biomes

• Lukewarm Ocean
• Deep Lukewarm Ocean
• Ocean
• Deep Ocean

Vanilla Biomes

• The End
• End Highlands
• End Midlands
• Small End Islands
• End Barrens

Vanilla Biomes

• Cold Ocean
• Deep Cold Ocean
• Frozen Ocean
• Deep Frozen Ocean

Vanilla Biomes

• Old Growth Pine Taiga
• Old Growth Spruce Taiga
• Taiga
• Dripstone Caves

Note: This is the minecraft:cold frog, but with adjusted spawn biomes.

Vanilla Biomes

• Forest
• Plains
• River

Vanilla Biomes

• Jungle
• Sparse Jungle
• Bamboo Jungle

Vanilla Biomes

• Deep Dark
• Dark Forest