do orangutans cry

Orangutans: Do They Cry Tears of Emotion?

By Robert LewisNovember 9, 2025

Do orangutans cry? It's a question that has puzzled many, given that tears are often associated with human emotions. Orangutans, like other great apes, do have tear glands and can produce tears for a variety of reasons, but their emotional display is more complex and nuanced than simple crying.

Orangutans do not produce tears in the same way humans do when we're sad or happy. Instead, their tears serve several functions, with emotional expression being only one aspect. Understanding this requires diving into their physical and behavioral adaptations, along with the intricacies of primatology.

The Anatomy of Orangutan Tears

Orangutans, like all primates, have tear glands located just behind the corner of their eyes. These glands produce tears to keep the eyes moist and protected from foreign particles. This is the first and most fundamental function of orangutan tears.

an adult oranguel is covering its face with his hands while standing in front of some trees

an orangutan sitting on top of a tree branch with its hands in his face

chemical analysis of orangutan tears has revealed that they contain a wide range of substances, including electrolytes, proteins, and antibodies. This composition suggests that orangutan tears, like those of many mammals, serve not just as a lubricant, but also as a defense mechanism against infections.

Emotional Tears in Orangutans

While tears can be a response to physical irritants in orangutans, they can also be a part of emotional expression. Orangutans have a rich emotional life, and they use a variety of communicative behaviors to express these emotions, including facial expressions, vocalizations, and body language.

a baby oranguel is peeking out from its mother's arms and looking at the camera

an orangutan is standing in the grass looking at something with its head turned

an orangutan with its mouth open and it's teeth wide open

Research has shown that orangutans do produce tears in response to emotional stimuli. For instance, they may cry when they are anxious or stressed, or when they are separated from their offspring. However, these tears are typically accompanied by other behavioral cues that help decipher their emotional state.

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Orangutans may also cry as a way to gain or maintain their attention or to signal for help. Mother-infant communication, for example, often involves the infant crying to signal its needs. Here, the tears serve as a visual cue, drawing the mother's attention and encouraging care-giving behaviors.

Moreover, orangutans are known to use "eping" – a soft, high-pitched vocalization used by infants to signal distress – in conjunction with crying. This combination can be particularly potent in attracting the mother's attention and eliciting a response.

an orangutan yawns while sitting in the middle of a forest

an orangutan sitting in the grass covering its face

an orangutan hanging upside down on a leaf with the caption sorry there's no room this is the dva section

orangutan smelling a flower (or eating it)

an adult orangutan with its mouth open in the trees, showing teeth

Orangutan Tears vs. Human Tears

While orangutans do cry, their tears differ significantly from human tears. For one, human tears are primarily a byproduct of our emotional expression, while orangutan tears serve a broader range of functions, including physical protection and communication.

Moreover, human tears are composed differently. They contain distinct ingredients, like the lipase enzyme, that aren't found in orangutan tears. This difference reflects the different evolutionary pressures these species have faced.

Evolutionary Differences

Humans, as a social species with strong affiliative bonds, have evolved to express emotions extracranially, using our faces and bodies. This includes crying, which signals our emotional state to others. This social function of human tears is less pronounced in orangutans, who, while social, are more solitary than humans.

a baby oranguel is wrapped up in a towel and looking at the camera

an orangutan is looking at the camera with its eyes closed and tongue out

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Instead, orangutans have evolved to rely on a suite of communicative behaviors, including tears, but tailored to their specific ecological needs and social structure. This makes sense considering their arboreal lifestyle and the complexity of their social interactions in a forest environment.

Conservation Implications

Understanding orangutan tears and their emotional communication can provide valuable insights into their welfare and conservation. For instance, observing changes in tear production and behavior in captive orangutans can help assess their stress levels and overall well-being.

Additionally, learning about orangutan emotions can inform our efforts to protect them in the wild. By understanding their emotional needs and how they express them, we can better address these needs in their natural habitats, whether through enrichment programs in zoos or by promoting wildlife-friendly practices in forest areas.

In conclusion, while orangutans do cry, it's a misnception to equate their tears with human emotions. Their tears serve a multitude of functions, reflecting their unique evolutionary history and social structure. Whether you're a primate enthusiast or just curious about these incredible creatures, understanding their tears adds another fascinating layer to our knowledge of these remarkable apes. To learn more about orangutans and how you can support their conservation, explore reliable scientific sources and reputable conservation organizations."