Renowned for their remarkable ability to adapt their food in response to seasonal environmental changes, Alouatta palliata, sometimes known as Howler monkeys. Unlike certain primates who rely largely on fruit or particular plant species, howler monkeys display nutritional flexibility that permits them to live even in times of food shortage. This adaptability is extremely necessary in the numerous Costa Rican environments where seasonal fluctuations can greatly affect the availability of specific...

Sloths are known for their slow movements and quiet existence; their low metabolic rates help to explain these. Still another crucial element affecting their behavior, though, is the daily light cycle, which regulates sloth rest and timing of activity. Sometimes known as the circadian rhythm, the routines and adaptations of some unique species depend considerably on natural light and the cycle of day and night.

Apart from their vivacious temperament, capuchin monkeys—also known as white-faced capuchins (Cebus capucinus)—have remarkable social intelligence. Found in tropical forests of Central America, this kind of monkey displays behaviors indicating a degree of social cognition akin to that of some upper primates. Therefore, the fact that their survival depends on their ability to form alliances and negotiate demanding social arrangements highlights the intricacy of their social life.

Though many people consider sloths silent creatures, these animals interact—especially during significant events like mother-infant bonding. Particularly, young sloths are surprisingly noisy; they squeal high-pitched when separated from their mothers. As a distress call, this sound guides mother sloths toward their offspring so they might help in their reunion. The vocalization is quite important in dense jungle surroundings, where vision is limited, and sounds transfer better than sight.