These may look like your garden variety American crows, but trust me folks, these are in fact fish crows. They give a very fun call that sounds like a crow who has swallowed helium and gives a nasally "ha haw" although Non Birding Bill insists that they are calling "a**hole". I don't think that pnuemonic will ever make it into a Sibley, Kaufman or Stokes guide...maybe a Stiteler guide someday.