In the last decade, scientists have discovered a surprising new species of bird, one that is known only as a rooster, and that is calling out to humans through a strange, almost-silent song.
Scientists at the Smithsonian’s National Zoo in Washington, D.C., have been studying the songbird for several years now.
The new species, named D. bicolor, is a member of the genus Drosophila, which is found in North America, Australia, and New Zealand.
In the wild, Drosphila roosters have no nest, so they can only call out to their parents.
The songbird uses its long, thin beak to scratch its feathers, making the sound of its call a high-pitched, low-pitch squawk that mimics the sound a roosting duck makes.
The birds’ song is different from any other bird’s in that the sound is not accompanied by a melody.
The call is produced by an inner membrane of air in the wing membrane that allows the sound to escape the bird’s throat and be transferred to the animal’s vocal chords.
Scientists have long been interested in D. bohemianus, a species of songbird that sings a similar high-frequency sound to the rooster’s song.
But researchers knew the roosted birds have a different structure, so researchers first thought the roos were making their own sound.
The scientists decided to investigate whether D. boom had its own vocal system.
In a series of experiments, they recorded the roo’s call, which the birds made by singing their own song.
They also recorded the bird in the wild.
In both cases, the researchers found that the rooing sound was much closer to the sound produced by a real bird than it was to a bird that had no sound system.
Researchers also noticed that the bird had an extra membrane in its wing membrane.
When the researchers moved the membrane to different parts of the bird, they could hear the bird.
In all of these studies, D, bicolors’ call was nearly twice as loud as that of a bird without any sound system and was louder than the call of a songbird.
The researchers found a second membrane was also important to the bird: The two different membranes had different frequencies of sound that the animals could use to communicate.
These signals are what give the roozes their sound, said study lead author Kristin A. Eick, an associate professor of evolutionary biology at the University of California, Davis.
“That’s really the key difference between them,” she said.
In order to be able to tell the difference between real birds and the rozos, the scientists had to record the rootes calls.
“We didn’t record all the calls.
That was a lot of work to do,” said study coauthor Robert B. O’Donnell, a researcher at the Museum of Comparative Zoology in London.
“But it’s an exciting step forward.”
For more information about the study, including additional data collected during the study and video clips of the birds, visit the Smithsonian.org website.