Why do birds sing? (Part 2 of 2)

A singing bird creates musical sounds using its syrinx. This organ is a kind of double voice box at the bottom of the bird’s windpipe. Where the windpipe branches into the bird’s lungs, two sets of membranes and muscles vibrate at high frequencies as air is exhaled. In fact, while singing, a bird can alternate exhaling between its two lungs and thereby sing in harmony with itself.

Northern Mockingbird

Usually a male that is defending a territory or attracting a mate will sing from one of the highest or most conspicuous perches available. This favorite spot may be used repeatedly. On the other hand, some birds such as larks, Bobolinks, and buntings – often sing while flying. And while birds do not usually sing around their nests, a few may sing a quiet “whisper song” that can be heard for only a few yards.

Northern Mockingbird

In the final analysis, different birds sing different songs, but they usually sing for the same reasons.

Female Rose-breasted Grosbeak

And who knows, some of those reasons may be that they are well-fed, stress free, and what we would anthropomorphically describe as “”happy!”