Here's why:
* Domesticated Origin: White mice are a domesticated form of the house mouse (*Mus musculus*), originally native to Asia. They were bred for their white fur and used for research and as pets.
* Introduced Species: White mice, like house mice, are considered an introduced species in California. They were likely brought to the state by humans and have established wild populations.
* Wild Mouse Species in California: The only native mouse species in California are deer mice, harvest mice, and pocket mice, among others. These are all different species from the house mouse.
It's important to note that while white mice are not native to California, they can be found in the wild as part of the introduced house mouse population.