Its not just football supporters who join together in a rousing chorus to celebrate a victory. Winning a fight also appears to put the tropical boubou, an African bird, in the mood for a song.
Research published in BMC Ecology describes a rare example of a context-specific birdsong and identifies the tropical boubou as the first bird species known to sing a victory duet.
The birds probably sing to deter other birds from intruding into their territory. According to the authors, "We were able to hear the male note of the victory display across two territories, further than notes of other duets. Also, it was typically sung from higher perches than other duets, making it more conspicuous."
Tropical boubous are monogamous birds. The male and female of a pair often sing duets, with each bird having a distinct part.
German researchers Ulmar Grafe and Johannes Bitz visited the Comoe National Park in Ivory Coast to find out how tropical boubous respond to their territory being invaded. The researchers broadcast recordings of four duets, which are often sung during contests over territory, to 18 different pairs of birds.
Sixteen of the tropical boubou pairs stood their ground, and 11 of these pairs sung the victory duet within 30 minutes of the researchers turning off their tape machine. The birds that flew off, presumably after losing; the battle, didnt sing a note for at least 30 minutes.
The victory duet was the first and only song that the birds sung within 30 minutes of the antagonistic encounter. The tropical boubous waited for at least 150 seconds of silence, to check that the invaders had gone, before they announced they were the winners.
"Analysis revealed that the presumptive victory display was sung significantly more often after than before or during playback of recordings," write the researchers.
Like other duets sung by male and female tropical boubous, the victory duet contained "highly synchronised tonal notes that were often repeated." However this song was longer than the other 12 songs in the tropical boubous repertoire, with the same motif being sung around 40 times on average.
Gemma Bradley | BioMed Central
Despite government claims, orangutan populations have not increased. Call for better monitoring
06.11.2018 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig
Increasing frequency of ocean storms could alter kelp forest ecosystems
30.10.2018 | University of Virginia
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
Physicists at ETH Zurich demonstrate how errors that occur during the manipulation of quantum system can be monitored and corrected on the fly
The field of quantum computation has seen tremendous progress in recent years. Bit by bit, quantum devices start to challenge conventional computers, at least...
Scientists developed specially coated nanometer-sized vehicles that can be actively moved through dense tissue like the vitreous of the eye. So far, the transport of nano-vehicles has only been demonstrated in model systems or biological fluids, but not in real tissue. The work was published in the journal Science Advances and constitutes one step further towards nanorobots becoming minimally-invasive tools for precisely delivering medicine to where it is needed.
Researchers of the “Micro, Nano and Molecular Systems” Lab at the Max Planck Institute for Intelligent Systems in Stuttgart, together with an international...
09.11.2018 | Event News
06.11.2018 | Event News
23.10.2018 | Event News
12.11.2018 | Life Sciences
12.11.2018 | Materials Sciences
12.11.2018 | Physics and Astronomy