More than merely a symbol of Costa Rica's great diversity, the howler monkey, also known as the "mono aullador," is integral to the nation's character. Among the simplest creatures in Costa Rica are these loud and fascinating ones. They are a component of daily life, mythology, and even environmental consciousness among people.

Few creatures have captured hearts as totally in the wide and quirky world of the internet as the sloth. Especially in viral videos when they raise their arms and make many viewers assume they are either expressing thanks or pleading for a hug, these slow-moving, apparently always smiling creatures have become social media stars. Though they appear beautiful, these actions are not what they seem.