Jealousy is a complex emotion that is often associated with humans, but it is not exclusive to us. Research has shown that animals also experience jealousy. Jealousy is defined as the negative emotional response to a perceived threat to a valued relationship or resource. This can include a romantic partner, attention from a caregiver, or access to food or toys.


Studies have shown that primates, dogs, and even birds exhibit behavior that suggests they are experiencing jealousy. For example, a study conducted by researchers at the University of California, San Diego found that when a dog’s owner interacted with a fake dog that barked and wagged its tail, their real dog would push and nudge their owner in an attempt to get attention. Similarly, a study conducted by researchers at the University of Vienna found that chimpanzees become agitated and aggressive when a rival chimpanzee receives more food than they do.


Some researchers argue that these behaviors may not necessarily be indicative of jealousy, but rather a desire for resources. However, other studies suggest that animals may have a more complex understanding of social relationships than previously thought. For example, a study published in the journal PLOS One found that crows showed signs of jealousy when their mate interacted with a potential rival. The crows displayed aggressive behavior towards the rival and became more affectionate towards their mate when the rival was present.


It is important to note that jealousy in animals may not always manifest itself in the same way as it does in humans. For example, dogs may display jealousy through attention-seeking behavior, while cats may withdraw or become aggressive. Additionally, the intensity and duration of jealousy may vary depending on the individual animal and the situation.


Overall, research suggests that animals do experience jealousy in some form. While more research is needed to fully understand the nature of this emotion in animals, it is clear that it is not unique to humans. Understanding jealousy in animals can provide insight into the evolution of emotions and social relationships across species.

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