Morning Bird Chorus

The mist covered land hides within it the many beautiful birds that waddle through the mud on their way to the next patch of wet grass. The calls of these friendly little flyers fills nature's heart with happiness and reminds the silent group of bird watcher's why they overflow with awe and cheer every time they are here. Scientists hypothesize that bird song has evolved through sexual selection, and experiments suggest that the quality of bird song may be a good indicator of fitness. Experiments also suggest that parasites and diseases may directly affect song characteristics such as song rate, which thereby act as reliable indicators of health. The ability of male birds to hold and advertise territories using song also demonstrates their fitness. Individual birds may be sensitive enough to identify each other through their calls. Many birds that nest in colonies can locate their chicks using their calls. Calls are sometimes distinctive enough for individual identification even by human researchers in ecological studies. This sound uses the following file from Freesound:http://www.freesound.org/samplesViewSingle.php?id=101330