Dr Russell Mittermeier is a world renowned primatologist ... just since 2000 we have described fully 95 new species of primates I am often asked why I am so interested in primates.

Howlers are New World monkeys found in tropical Central and South America. They are aptly named for their cacophonous cries. When a number of howlers let loose their lungs in concert, often at ...

The role of body-size variation as a "line of least evolutionary resistance" has been documented in both Old and New World monkeys (Figure 2). In these cases, diversification of cranial form ...