Carrion Crow chicks sit back and let Great Spotted Cuckoo chicks do the begging, but still gain equal shares of food brought by parents. http://www.sciencedaily.com/releases/2015/04/150415103015.htm?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+sciencedaily+%28Latest+Science+News+–+ScienceDaily%29 Carl Clifford
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