Chicken has owner asking, ‘What the duck?’ Almost every scientific source you will find confirms that a chicken and a duck cannot interbreed. However, according to Cleveland resident Ron Schneider, “In nature, anything is possible.”
July 5, 2013 - Cleveland Advocate
Hendrik Poinar in Boston Globe (registration) The Siberian mammoths didn't hybridize, didn't just interbreed and blend with the new population - they disappeared,Poinar said. "And the New World guys ended up kings of the evolutionary heap."