Warm and Cold Creepers and Spiders

Now that we have warm and cold variants for Skeletons and Zombies, I think Creepers and Spiders should get the same treatment. Warm Creepers and Spiders could spawn in hot biomes such as Deserts, Badlands, and Savannas, with warmer or more desert-like textures.

Cold Creepers and Spiders could spawn in snowy and icy biomes, with frosted, snowy, or icy appearances. They wouldn't need any new abilities or drops. The variants could simply be cosmetic, helping hostile mobs feel more connected to their environment. If Mojang continues expanding biome based mob variants, Creepers and Spiders seem like the natural next candidates.

Currently for the Zombie we have: Regular, Husk & Frozen. 
And for the Skeleton we have: Regular, Stray, Parched & Bogged.