Retired principal investigator (Peter J. Vollagar) teamed up with Carl Tun Keith, a biologist at Leiden University in the Netherlands, to conduct the first in-depth analysis of these recordings. This analysis confirmed that rappers' distinctive voices are in fact a form of imitation—perhaps the first comprehensive documentary on musk ducks capable of mimicking the sounds. The researchers published their findings in a new research paper published in the journal Philosophical Transactions of the Royal Society B, which is part of a special issue on learning to sing in animals and humans. Productive learning can be different, but if the animal, which is bred separately, produces sounds that deviate significantly from what is usually identified for a species or is able to imitate the sounds of other species. , is evidence of this phenomenon. Learning to produce singing is important for the development of human speech and language, but there are only a few confirmed reports of these in animal species: the main ones being whales, dolphins, bats, elephants, songbirds, parrots, and chickens are hummingbirds. . Musk ducks get their name from the pungent smell that males produce during the mating season. Males are usually three times larger than females and have a large black lobe under the leg that can be loose or 'targeted'. Males' mating displays can include raising and lowering the tail and kicking sideways and back with the legs to create large sprays of water. Males also flaunt their rounded lobes to attract females and make whistling sounds. The musk duck is the only living member of its species and is in close contact only with other birds that are able to imitate their sounds. The only boys are so aggressive that musk ducks are rarely bred in captivity, but the Reaper was an exception. He was born in September 1983 in the Tidbinbilla Conservation Area, southwest of Canberra. The breeding hen was responsible for taking care of the eggs, but after they left, the reaper was raised and fed by individuals under separate care. Waterfowl were bred and later kept in a small barn hidden from view by a bush. According to the authors, this pen is divided into two spaces connected by holes under the surface of the water. Two ducks from another reserve could pass through the holes, but the rapper could not. The women were around when the rapper introduced his legendary vocals.
Zoom/(a) broadband sonography and (b) narrow bandwidth". Produced by Ripper. (C) A masculine voice of a man producing the same phrase. It was in the first few weeks after he left, sometimes a hiss and a sudden hiss, a sound like speech but no recognizable words. Recorded when Fullagar was approaching y, “Because it's a way to get [Ripper]'s attention.” The authors wrote. “When I first read it, I thought, 'This is a hoax, it can't be true,'" he told The Guardian when he first heard it. That’s right.” The male was raised by a female black duck who was captured in the same reserve and rappers were sometimes vulnerable. Perhaps that’s why these sounds include a similar to a loud smasher sound, followed by a whistle. There are recordings, so these accounts cannot be verified. A duck was coughing and snoring "like a horse" - yes, a rosary horse lived nearby - sometimes trying to salute the gardener. It is said that someone else can mimic a bird-keeper's characteristic cough and squeak.
"This is your food Bloody."
For their analysis, Fulgar and ten people created ultrasound kits for different sounds produced by Australian rappers and ducks. The vocal sounds of ducks correspond to those being imitated - including a human male saying "bloody idiot," Although ten groups told the Guardian they might have the last word “food.” In all ten groups, “I can imagine the caretaker jokingly saying, 'This is your bloody food.'” And the rapper learned to imitate it on this basis.
"Together with previous observations of vocal differences between populations and skewed observations, these observations show that there is advanced vocal learning at a level comparable to that of songbirds and parrots." This is important because it most likely represents an "independent development". Only a few babies at a time, who depend on the mother to feed them until they are fully developed. This means that there is a longer social relationship with the mother duck, along with the normal moulting that usually occurs. "A detached black duck, like a rapper, is likely to have a strong attachment to the man who takes care of it," the authors wrote. In addition, "longer dependence periods may be associated with progressive development of the nervous system and provide the basis for a greater influence of experience (learning) on behavioral development."
DOI: PNAS, 2021. 10.1098 / rstb.2020.0243 (about DOIs).