Labels:text | screenshot OCR: CHORUSES In many parts of the world, birdsong reaches a peak at particular times of the day, and during certain seasons of the year. These floods of song are known as choruses. In temperate 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 season, birds sing most often in the few hours after dawn, at dusk, and after rain. SEE ALSO