http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0020551
-- Clara B. Jones Work: www.communityconservation.org Blog: http://vertebratesocialbehavior.blogspot.com Twitter: http://twitter.com/cbjones1943 "Neither 'Origin of Species' nor the Price Equation was dashed off by a party animal."