do their most spirited singing

[arueng]

Cicadas like heat and do their most spirited singing during the hotter hours of a summer day. Although only males produce the cicadas' distinctive sound, both sexes have tympana, which are membranous structures used to detect sounds and thus the cicadas' equivalent of ears. Males can disable their own tympana while calling.

HI,

What does "spirited singing" in the above refer to? Is it lively and bouncy singing? Thanks.


http://en.wikipedia.org/wiki/Cicada

 

[Ceremoniar]

Spirited here means loud and enthusiastic. The sounds that cicada makes are being likened to songs, so the expression means that is the time of the day when cicadas are the loudest.