<p>Complaints are common. Cormorants kill trees. They eat too many fish. Their colonies stink.&nbsp;</p><p>Warren Hoselton has had enough. After three years of watching his beloved trees around his Ontario home be decimated by cormorant poop, he wants action. The birds have to go.&nbsp;</p><p>But not everyone has a hate-on for cormorants. Avian ecologists say it's not fair to fault birds for doing what nature designed them to do.&nbsp;</p><p>The ones living in a park on the edges of Canada’s largest city, reached 20,000 this year, angering locals worried about their impact. In Toronto, they’re trying to relocate them. Elsewhere, hunters shoot them.&nbsp;&nbsp;</p><p>All across North America cormorants make enemies because of the mess&nbsp; they leave behind. </p><p>Storylines is part of the <a href="https://www.cbc.ca/radio/audiodocs" rel="noopener noreferrer" target="_blank">CBC Audio Doc Unit </a></p><p><br></p>