bird song examples

We may initially rely for our examples on snapshots of recordings available on-line, with sources linked so that those so inclined can also hear what they are seeing.

To start with, the 12-second snippet below illustrates some northern cardinal bird calls (mostly "chirps" covering more than one octave) from the enature site here, played from the web, recorded as a wma file, converted to wav, and then uploaded for display into Mathematica. The output should be comparable to shorter-duration snippets recorded today with our black and white app e.g. through a browser on your phone, and also (downstream) with full 12 second snippets recorded with our complex-color app when it comes on-line.

Next is direct visualization of an mp3-captured sound from the Audubon field-guide site, this one for a "high-G" whistle from the "clarinet-sounding" mourning dove:

As you can see, there is quite a contrast in appearance between a dove's "high-G" whistle and a cardinal's "more-than-one-octave" up and down chirps. 

For our last "front-page" example, take a look at this lovely ruby-throated hummingbird snapshot of audio found on the Audubon field-guide site, which some notes (in white) as to what you are looking at superposed on treble and bass clef:

In this context what might hoots, warbles, quacks, hums, taps, cheeps and gobbles look like by comparison? And then we might ask how the appearance of "whip poor will" compares to a voice rendition. Stay tuned...