I can get one butterfly to sing, and sure, it takes a lot of energy and frankly, doesn't sound that great. But, you know, it's an experience.
Possibly if I practice with my butterfly, it should get better at singing. And it might take less of my energy.
Possibly, if I collect a bunch of singing butterflies, I should be able to have a butterfly choir. Which might sound like a kindergarten tin whistle concert if those butterflies haven't been practicing, but might sound totally awesome if they have.