Comment by dkga

Beautiful. An interesting tidbit some here may like: for some birds, their songs carry over genetically. As a result, there are no dialects in the same sense as described in this page. The most famous example (at least in the Americas) is Pitangus sulphuratus (known in Brazil as "bem-te-vi"). This bird is present from Southern US until Southern Argentina, and has virtually the same song all over. In fact, I know I arrived in Brazil when I get out of the airport, anyone in the country, and catch a (sometimes clear, sometimes faint) "bem-te-vi, bem-te-vi" song.