Duck species can imitate sounds


Male, Sandford, Tasmania, Australia. Credit: JJ Harrison (jjharrison.com.au/), CC BY-SA 3.0
Male, Sandford, Tasmania, Australia. Credit: JJ Harrison (jjharrison.com.au/), CC BY-SA 3.0

That a parrot can copycat sounds is nothing new. But vocal learning is not common in animals. Researcher Carel ten Cate of the Institute of Biology Leiden (IBL) of Leiden University has now discovered a duck species that can imitate sounds. It started with an obscure reference about an Australian musk duck and ended in a nice paper.


Being able to learn how to make particular sounds is a rare characteristic. This vocal learning occurs in humans as well as in some dolphins, whales, elephants, and bats. But for most mammals, it does not seem to be in their nature. A barking cat, mooing mouse, or singing giraffe: you won't be coming across them anytime soon.


However, some birds may be able to do this, Ten Cate tells. Although also for this group, vocal learning is rare. We know that songbirds, parrots, and hummingbirds can learn to make specific sounds. This includes many species, but that is because vocal learning originated in the ancestral species of these groups. Therefore, researchers generally assume that vocal learning evolved in only three of the 35 orders in which all bird species are classified.


With the discovery of imitating duck, Ten Cate introduces a new order into this elite group. He was compiling his knowledge on vocal learning on birds into a review when he came upon an obscure reference about an Australian musk duck (Biziura lobata). The animal was reported to imitate a human voice, sounding like 'you bloody foo(l)".


The duck was also reported to be able to imitate other sounds, such as a slamming door.


Ten Cate said, this came as a big surprise. Because even though the bird was recorded 35 years ago, it remained unnoticed by researchers in the vocal learning field until now. That makes it a very special rediscovery.


He tried to trace the source of the recording, with success. It appeared to be an Australian birder who recorded the duck around 1987.


Ten Cate said, the man, Peter Fullagar, told me that the duck was hand-reared and would have had heard the sound as a duckling.


He analyzed the recordings in detail and published them with Fullagar as co-author. Additionally, they discovered other cases of musk ducks that imitated noises, such as a snorting pony, the cough of a caretaker, and a squeaking door.


The observations indisputably show that this duck species can imitate a surprising and divergent range of sounds. It is the only bird species outside of earlier mentioned groups that shows this quality of imitation. And the level at which they can do this is similar to other imitating species.


Ten Cate said, in the evolutionary tree, the duck branch split off early from the other bird groups. To observe vocal learning in such a group makes this find extra remarkable. It is not yet clear why this particular species is capable of vocal learning.



Journal Information: Vocal imitations and production learning by Australian musk ducks (Biziura lobata). Phil. Trans. R. Soc. B 20200243. doi.org/10.1098/rstb.2020.0243

Re-evaluating vocal production learning in non-oscine birds. Phil. Trans. R. Soc. B 20200249. doi.org/10.1098/rstb.2020.0249


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