My house bunny wags her tail. I know most body language of bunnies but can not find if this has any meaning to it.

No one really knows the answer to this.

Even with more advanced domesticated animals such as cats, various "body language" issues are arguable. For example, some cats sway their tail when they're happy, and some do it when they're angry... and some do it for no reason.

The trivia lover in me sent me surfing... and I came up short on finding anyone making a solid claim about the meaning of rabbits wagging their tails.

A friend of mine breeds mini rex's and lope earred rabbits, she swears that that's when they are being curious... a nervous curious like when a dog crouches down to sniff something... but really, it's anybodies guess *L*

What a fun question!

I had French Angora rabbits many years ago and often wondered the same thing.

Thanks to your question I, like RickJ, had to do some searching on the subject and came up with this link:

http://www.paperglyphs.com/rabbits/rabbittalk_unknowns.html

Not exactly conclusive fact, but it's fun to guess about it all the same!

Thank you all for trying. I have been unable to find if this had any meaning, and it nice to know others have tried to solve this little mystery. I will keep trying.