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Bats Show Surprising Cognitive Skills, New Study Reveals

Researchers at Tel Aviv University (TAU) have discovered remarkable cognitive abilities in Egyptian fruit bats, challenging long-held beliefs that complex cognitive functions are unique to humans.

The study, conducted by Prof. Yossi Yovel and Dr. Lee Harten along with a team from TAU’s School of Zoology and Sagol School of Neuroscience, explored whether these bats possess episodic memory, the ability to mentally time travel, plan, and demonstrate delayed gratification. Using a colony of free-ranging fruit bats from TAU’s I. Meier Segals Garden for Zoological Research, the team attached tiny high-resolution GPS trackers to the bats. This allowed for the documentation of their flight routes and the trees they visited over several months. The data collected led to fascinating insights into the bats’ cognitive processes.

One of the key findings was that bats form mental time maps. When prevented from leaving the colony for varying periods, the bats’ behavior suggested an awareness of the elapsed time. After a day, they returned to previously visited fruit trees, but after a week, they avoided trees that had stopped bearing fruit, demonstrating an ability to estimate the passage of time based on past experiences. This skill appeared to be learned, as younger, inexperienced bats did not exhibit the same behavior.

The researchers also investigated future-oriented behaviors. They found that bats often flew directly to a specific tree, even if it was 20 or 30 minutes away, indicating premeditated plans. Their speed varied based on their hunger, and they exhibited delayed gratification by passing other food sources to reach their chosen target. Additionally, the timing of the bats’ departure influenced their dietary choices, with early leavers seeking sugary fruits and later ones opting for proteins.

These findings suggest that fruit bats engage in complex decision-making processes, considering the location, timing, and nutritional value of their food sources. Prof. Yovel emphasized that the cognitive gap between humans and animals is not as wide as previously thought, with many human-like abilities also present in animals.