Here is a site with all types of penguin sounds as well as information.
http://www.junglewalk.com/sound/Penguin-sounds.htm
penguins make sounds like squak
yup
no.
by making a wierd piercing noise to warn other penguins
they get stressed out and refuse to mate (reproduce)
of course they do! but I don't know how it's sorta a bird noise :)
Penguins cannot make pancakes.
penguins make their habitats in club penguin and their igloos
Penguins that make nests -- not all penguins make them -- form them from stones that the males can pick up and carry in their bills.
Penguins.
They make noise by making it.
No, goldfish do not make noise.