you can use books, internet and many other resorces..i would probably type into the search engine "penguins" or i would go to google images and type in "penguins" or another search engine similar.
You can find penguins anywhere. If you want to find penguins, I suggest you don't go on servers with not many penguins in. Usually there's no one around, so I don't think that's the right place .. Go...