avian http://redriverradio.org en Bird Calls with Cliff Shackelford http://redriverradio.org/post/bird-calls-cliff-shackelford-1 <p><strong>Aired Thursday, &nbsp;December 19 at 6 p.m.</strong> <strong>Ornithologist Cliff Shackelford</strong>, from the <strong>Texas Parks and Wildlife Department</strong>, took your questions</p><p> Fri, 20 Dec 2013 00:00:00 +0000 Bill Beckett & Cliff Shackelford 37701 at http://redriverradio.org Bird Calls with Cliff Shackelford