kärusid

I’m happy to write a wiki-style article, but I’m unclear about what “kärusid” refers to. Could you please clarify the context or language? For example:

- Is it Estonian (and if so, what is the exact meaning or usage)?

- Is it a biological term, a place name, a cultural concept, or something fictional?

- If you have a specific source or definition in mind, sharing it would help.

Once I know the intended meaning, I can generate a concise, neutral article of under 300 words.