Baby Fairy-Wrens Tweet Incubation Password for Food
Female superb fairy-wrens, Malurus cyaneus, teach their unhatched chicks a unique note that later allows the parents to distinguish their babies from parasitic cuckoos when the nestlings beg for food.
![Baby Fairy-Wrens Tweet Incubation Password for Food](/_next/image?url=https%3A%2F%2Fimg.theepochtimes.com%2Fassets%2Fuploads%2F2015%2F07%2Fwren-700x420.jpg&w=1200&q=75)
By Cassie Ryan
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