San Diego Zoo's official website has a page devoted to our simian friends, with lots of color photos and a thorough list of facts and information. There is a special section about how monkeys communicate with each other in their large groups. For those who wish to get involved in the effort to support these endangered species, there are tips and links to outreach programs provided.<
With "Fast Facts", such as diet, size, and weight, and a separate more detailed text, the National Geographic does a great job of exploring the Spider Monkey. The site also includes a sound clip of a real Spider Monkey and a video.
What's the loudest animal in the world? The Black Howler Monkey! The National Zoo's Howler Monkey page is stuffed with interesting information, and even a link to "meet" the Zoo's two newest Black Howler Monkeys.