 Most species chirp at higher rates the higher the temperature is (about 62 chirps a minute at in one common species; each species has its own rate).The relationship between temperature and the rate of chirping is known as Dolbear's law.According to this law, counting the number of chirps produced in 14 seconds by the snowy tree cricket, common in the United States, and adding 40 will approximate the temperature in degrees Fahrenheit.