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Home»Biology»Birds Learn Innovative Songs from Neighbors Through Social Transmission
Biology

Birds Learn Innovative Songs from Neighbors Through Social Transmission

October 16, 2024No Comments5 Mins Read
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Songbirds like the Chinese blackbird are known to mimic the calls of other species, including cuckoos. But how do these birds learn these mimicry skills? A new study has found evidence that blackbirds can learn unique mimetic calls from their neighbors through social transmission. This provides insights into the complex process of vocal learning in songbirds. The study also found that the mimicked calls have some differences from the original model calls, suggesting a trade-off between accuracy and flexibility in vocal learning. These findings shed light on the origins and development of vocal mimicry in birds, a fascinating aspect of animal behavior. Songbirds and vocal learning are both important topics in the field of animal behavior.

figure 1
Fig. 1

Mimicry in Songbirds

Many songbird species are known to incorporate the vocalizations of other birds, animals, and even human-made sounds into their own elaborate song repertoires through the process of vocal mimicry. This ability to imitate heterospecific sounds is found in around 9% of all songbird species worldwide. However, researchers still have limited understanding of how songbirds acquire these mimetic skills.

There are a few main ways that songbirds can learn mimetic vocalizations: 1) directly from the model species, 2) from their conspecific (same-species) tutors through social learning, or 3) through the evolution of innate calls. Most songbird mimics are thought to learn through the first two pathways, but evidence for the specific mechanisms has been scarce.

Learning Innovative Mimicry from Neighbors

In this new study, researchers focused on investigating how the Chinese blackbird, a common urban songbird in China, learns to mimic the calls of cuckoo species. Cuckoos provide ideal models for this research because their calls are simple and stereotyped, making any imitation errors or innovations easy to identify.

The researchers recorded the song repertoires of 57 male blackbirds across multiple sites in the city of Nanjing. They found that about 44% of the blackbirds mimicked vocalizations from three cuckoo species: the large hawk-cuckoo, Asian koel, and Indian cuckoo.

Interestingly, the team identified four unique types of mimetic units that were shared by multiple neighboring blackbirds within the same sites, but not found in other areas. This suggests that these unique mimetic innovations were learned from conspecific tutors through social transmission, rather than directly from the model cuckoo species.

Balancing Accuracy and Flexibility

The researchers also compared the acoustic structure of the blackbirds’ mimetic calls to the original cuckoo calls. They found that while the mimicry was reasonably accurate overall, there were some consistent differences. For example, the mimetic calls tended to be shorter in duration compared to the model calls.

The researchers propose a few possible explanations for these differences:

  • Blackbirds may modify the calls to save energy when producing them, as cuckoo calls are typically loud and long-range.
  • Inaccuracies may arise from learning the calls from other blackbirds, rather than directly from the cuckoos.
  • Physical limitations of the blackbird’s vocal anatomy may constrain their ability to perfectly replicate the cuckoo vocalizations.

These findings suggest that songbirds like the Chinese blackbird may need to balance accuracy in mimicry with flexibility in their vocal learning and production abilities. Further research is needed to fully understand the complex interplay of social learning, individual innovation, and physical constraints in the development of vocal mimicry in birds.

figure 2
Fig. 2

Insights into Vocal Learning

This study provides new evidence that songbirds can acquire mimetic vocalizations, at least partially, through social learning from their neighbors. The discovery of unique mimetic units shared by multiple individuals within the same local population is a key finding supporting this idea.

Beyond just imitating other species, the blackbirds in this study also showed the ability to innovate and modify the mimetic calls, creating new variants that were then shared with their neighbors. This suggests a sophisticated vocal learning process, where birds can extract and recombine elements from different models to create novel vocalizations.

Understanding the mechanisms behind vocal mimicry acquisition is an important area of research in animal behavior and birdsong development. The insights from this study on the Chinese blackbird contribute to a growing body of knowledge on the social and cognitive aspects of vocal learning in songbirds. Further research on other mimicking species could help reveal whether this type of innovative mimicry learning is a widespread phenomenon in the avian world.

Author credit: This article is based on research by Changjian Fu, Xiaochun Wang, Fiona Backhouse, Zhongqiu Li.


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This work is made available under the terms of a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. This license allows for the free and unrestricted use, sharing, and distribution of the content, provided that appropriate credit is given to the original author(s) and the source, a link to the license is provided, and no modifications or derivative works are created. The images or other third-party materials included in this work are also subject to the same license, unless otherwise stated. If you wish to use the content in a way that is not permitted under this license, you must obtain direct permission from the copyright holder.
animal communication Chinese blackbird cuckoo social transmission songbird behavior Vocal learning in primates vocal mimicry
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Tech enthusiast by profession, passionate blogger by choice. When I'm not immersed in the world of technology, you'll find me crafting and sharing content on this blog. Here, I explore my diverse interests and insights, turning my free time into an opportunity to connect with like-minded readers.

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