Penguin Audio, Different Audio Sounds that Penguins Make
Here are some audio sounds from different types of penguins. You will notice that not each penguin audio sound is not the same.
All penguins use sounds to communicate. Chicks in large colonies need to be able to attract their own parents so that they can be fed, adults need to recognise one another when they come back from fishing trips, etc. Different species make different noises. African, Humboldt, Magellanic and Galapagos all make braying sounds (like a donkey) and each of these species has at some time been known as "Jackass" penguins as a result. Their chicks, in contrast, make a high pitched whistling noise to demand feeding. The Yellow-eyed penguin makes a trilling sound (not unlike the old "trim-phone").
You will need Real Player to listen to these audio sounds, as they are in .ram format.
Here also is a good video showing a penguin making sounds. It is funny and great to watch. Penguin audio video.