Male Java sparrows may coordinate their bill-clicking sounds with the notes of their song. Birds may communicate using both vocalizations and movement, as for instance occurs during courtship displays ...
The Java sparrow is ready for the video recording. As I hold it carefully in my hand in order to transfer it to the recording cage, the little gray bird bites my finger with its thick red bill. Ouch!
Male Java sparrows may coordinate their bill-clicking sounds with the notes of their song, according to a study published May 20, 2015 in the open-access journal PLOS ONE by Masayo Soma and Chihiro ...
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