An archaic collective noun for a group of jackdaws is a clattering.. Another term used is train (White 1833); however, in practice, most people use the more generic term flock.. Source(s): http://www.newworldencyclopedia.org/entr...n archaic collective noun for a group of jackdaws is a clattering.. Another term used is train (White 1833); however, in practice, most people use the more generic term flock.. Source(s): http://www.newworldencyclopedia.org/entr...