Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Sonagrams illustrating two of the song types categorized as ‘short’ (a, b), two of the song types categorized as ‘long’ (c, d), one interrupted song (e), and one compound song (f). The number and type of phrases constituting songs varies between song types, but songs tend to start with softer elements and end in a loud trill.
