Tape-recorders allow us to record and analyze birds’ singing, but communicating with birds is more difficult
From time immemorial, people have listened to the birds singing, recognized birds by voices, have been able to guess their condition. Some people are able to successfully imitate bird’s singing. Only in the 50s of the last century, researchers managed to put the matter on a strictly scientific basis, when the tape equipment became available. Researchers started to record birds’ sound signals and to analyze their frequency and rhythmical peculiarities. B.M. Zvonov, specialist of the Severtsov Institute of Ecology and Evolution Problems, Russian Academy of Sciences, has spent more than 30 years on this investigation. He analyzed the mechanism of creating alarm signals and breeding songs of multiple bird species and came to the conclusion that all signals were based on common principles, the knowledge of which allows to communicate with birds and to control their behavior.
Let us take fledgings, for example. They give sound signals so that the parents would not forget about them. Each species has individual frequency characteristics of this squeak. When fledgings are fed up and happy with life, their pipe is rhythmical. That signals for proper order. Once a baby bird gets hungry, it starts to signal much more frequently, this being a common pattern for all investigated bird species. The parents, when they hear a more frequent ‘yells’ of their baby, rush feeding and protecting it.
Sergey Komarov | alfa
A novel socio-ecological approach helps identifying suitable wolf habitats
17.02.2017 | Universität Zürich
New, ultra-flexible probes form reliable, scar-free integration with the brain
16.02.2017 | University of Texas at Austin
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
20.02.2017 | Materials Sciences
20.02.2017 | Health and Medicine
20.02.2017 | Health and Medicine