When the little bluebird. Who has never said a word. Starts to sing Spring. When the little bluebell. At the bottom of the dell. Starts to ring Ding dong Ding dong. When the little blue clerk. In the middle of his work. Starts a tune to the moon up above. It is nature that is all. Simply telling us to fall in love. And that's why birds do it bees do it. Even educated fleas do it. Let's do it let's fall in love. Cold Cape Cod clams 'gainst their wish do it. Even lazy jellyfish do it. Let's do it let's fall in love. I've heard that lizards and frogs do it. Layin' on a rock. They say that roosters do it. With a doodle and cock. Some Argentines without means do it. I hear even Boston beans do it. Let's do it let's fall in love. When the little bluebird. Who has never said a word. starts to sing Spring spring spring. When the little bluebell. At the bottom of the dell. Starts to ring Ding ding ding. When the little blue clerk. In the middle of his work. Starts a tune. The most refined lady bugs do it. When a gentleman calls. Moths in your rugs they do it. What's the use of moth balls. The chimpanzees in the zoos do it. Some courageous kangaroos do it. Let's do it let's fall in love. I'm sure sometimes on the sly you do it. Maybe even you and I might do it. Let's do it let's fall in love