How To Tell There's A New Thread

There are now three codewords currently used by Atriots to announce Atrios has posted something new above a thread that is straining from the weight of hundreds (or now thousands) of comments:

• Sheets - the original codeword, replacing a straightforward "there's a new thread" approach.  It came out of troll-infested threads, and when a new post appeared, commenters would enjoy "clean sheets without troll messes".
• Owls - the origin is unclear, but in an attempt to not let trolls in on the fact that there was a new thread, somebody (fourlegs, perhaps?) started using "owls" in place of "sheets".  Anecdotal evidence suggests it was inspired by the use of owls as messengers in Harry Potter.
• Turtles - at the time of the Ben Domenech/WaPo scandal, it was discovered that he was responsible for a line about "box turtle marriage" in a speech by Sen. Cornyn.  Thus Ben was sometimes called "Box Turtle Ben", and yours truly agitated to make "turtles" the new "owls", with moderate success.

All three terms are equally valid now, and sometimes you will see a combination of 2 or 3 used in the same announcement.  Usage depends on great deal on the personality of individual commenters.

If anybody has links to the original threads where the codes were first used, please put them in comments.  I'm too lazy.

ntodd