Saturday, February 23, 2013
For males, which do all the singing during the breeding season, an elaborate repertoire sends a scintillating message to a female. Life is tough in the wild, where predators, disease and starvation are constant threats. The variety in a male's songbook is a signal to females that he is wise to the world, has survived for awhile and established a territory with plenty of food.
~Doug Harbrecht, National Wildlife