https://phys.org/news/2018-05-frog-climate.html > When this exceeds a certain threshold, the physiological processes associated with sound production are restricted, and some calls are even inhibited. In fact, the beginning, duration and intensity of calls from the male to the female are changed, which influences reproductive activity. > Taking into account this phenomenon, the analysis and classification of the sounds produced by certain species of amphibians and other animals have turned out to be a powerful indicator of temperature fluctuations and, therefore, of the existence and evolution of global warming.