ocr: CHORUSES In many parts of the word, birdsong reaches a peak at particular times oft the day,and during certain seasons ofthe year. These floods ofsong are known as choruses. In remperate regions, most birds sing only in spring, when they are courting and nesting. In the tropics there is no spring, sO bird- song IS more evenly spread. During their singing scason, birds sing most often in the few hours after dawn, at dusk, and after rain. SEE ALSO
