Gotten from the DC forums:
*They have NO Timer.
*They get NO Veiws, UV's, or clicks
*They WILL NOT grow up
*There's a limit of ONLY ONE PER SCROLL (If you get any more, it just vanishes into thin air)
*It looks like this:

*You CAN NOT abandon them
*Technically their eggs, but their frozen and counted as adults
*They don't affect how many eggs you have... almost like a frozen egg/hatchling... or like an adult
*If you have four or more eggs OR hatchlings, you can NOT get one
*The only action is kill, and when you try, it says: "The leetle tree is so cute you couldn't even consider trying to kill it." Basically, your stuck with it once you get it.
*They DON'T show up on incubators
*It's a christmas tree... it has ornaments and a star.
That's all I know about it... if you know anything else about it, feel free to post ^.^
I still can't catch one
gonk