Increasing the Fox Biodiversity

It would be an improvement to Minecraft's biodiversity if there were more variants of foxes, we've seen wolves, cows, chickens, and more get diversified based on biome. We even have red and arctic foxes. If there were other types of foxes that spawned in certain biomes like deserts and savannahs it would increase the biodiversity and desire to play for many people. Foxes have no reason to spawn in every biome but there is a need for increased biodiversity.