This is a new-ish song that AC played live on their last tour. It's not going to be on the new EP, "Water Curses" (out May 6 via Domino Records), so maybe we can expect to see it on their next full-length.
Just in case you haven't heard it yet, I'm posting the title track from the new EP below as well. I fuckin' love Animal Collective.
[MP3] Animal Collective - Water Curses from "Water Curses EP" (via Box.net)