Research published in the journal “Evolution” looks at how some birds make sound through closed-mouth vocalization, which are sounds produced through the skin around the neck when the beak remains closed, such as the coo of a dove, reports Futurity.
Researchers found that 52 out of 208 bird species use closed-mouth vocalization, and that the vocalization has evolved 16 times in archosaurs, which includes birds, crocodiles and dinosaurs, says Futurity.
Scientists say closed-mouth vocalization across birds and crocodiles -- living archosaurs -- shows that the communication can occur among all species of archosaurs.
Click here to read the full story on Futurity.
Click here to follow Daily Voice Tarrytown-SleepyHollow and receive free news updates.