Howler monkeys Monkey Facts | 1 comment The loudest howler monkeys have the tiniest testicles, a study found. Fact source 1 Comment W. A. on March 21, 2018 at 10:13 pm So, could we compare them, say, to liberal democrats? Reply Submit a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website This site uses Akismet to reduce spam. Learn how your comment data is processed.