Do Animals Act Weirdly During A Solar Eclipse? Or Do We?

Adam Hartstone-Rose didn’t expect his first eclipse to beryllium truthful interesting. It was 2017, and he was a biologist astatine nan University of South Carolina. A total star eclipse—when nan satellite temporarily blocks retired nan sun—was group to walk straight complete him, and he’d been invited to observe really animals astatine nan section zoo would respond to nan event. Hartstone-Rose didn't person precocious hopes for nan endeavor: nan eclipse would past minutes—not agelong enough, he thought, for nan animals to notice. He figured it couldn't beryllium much disruptive than a passing large wind cloud.

“It turns retired that I was wrong,” he says.

The eclipse was “amazing,” Hartstone-Rose says. And he saw many unexpected and downright overseas animal behaviors: arsenic he and his colleagues went connected to picture successful a 2020 paper, baboons huddled together; a colony of flamingos circled up astir nan juveniles; giraffes galloped; a Komodo dragon “ran erratically” astir its enclosure; siamangs, a type of gibbon, fto retired “atypical” barks; and a brace of Galápagos tortoises inexplicably began mating.

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Other observations made by Hartstone-Rose, who is now a professor astatine North Carolina State University, propose that immoderate animals astatine nan zoo behaved arsenic if it were twilight, starting their “nighttime routines.” Lorikeets, for instance, flew to their nest boxes. Gorillas gathered by nan gross to their den, and African elephants drifted toward their barn. Still, immoderate animals didn’t look to attraction astir nan eclipse astatine all.

At nan time, Hartstone-Rose wasn’t judge why nan animals reacted successful specified different ways. Were they stressed aliases confused? Or was location different reason? On that time successful 2017, nan zoo successful Columbia, S.C. , had been packed pinch visitors who’d piled successful to position nan eclipse. Indeed, Hartstone-Rose and his colleagues noted successful their 2020 insubstantial that immoderate of nan animals could person been startled by nan humans, but nan researchers weren’t sure.

They whitethorn person been onto something: human behaviour during eclipses, Hartstone-Rose says, whitethorn person much power connected animals’ behaviour than scientists thought. After all, we thin to ooh and ahh, clap, dishonesty connected nan ground, stitchery together and different behave, well, oddly.

“The animals that do nan strangest point during an eclipse, by far, are nan people,” he says. “I deliberation that’s really an mentation for immoderate of nan anomalous behaviour that we spot successful animals, too.”

In a caller study published in nan diary Zoo Biology, a abstracted group of Canadian researchers observed zoo animals during 2024’s full star eclipse, erstwhile nan zoo was closed to visitors. A fewer animals seemed to respond to nan alteration successful sunlight—the Japanese macaques climbed higher successful their enclosure, and nan zebras showed "some signs of stress," for example. But astir of nan observed creatures showed “little response,” nan authors wrote.

Indeed, successful 2024 Hartstone-Rose performed a akin research astatine nan Fort Worth Zoo successful Texas. The crowds astatine nan zoo were smaller than they had been successful 2017, and nan animals’ reactions were besides much subdued. The Dallas Zoo, meanwhile, hosted “a immense event,” pinch monolithic crowds, and nan animals reacted “much much strongly” during nan eclipse, he says.

“We don’t deliberation astir it, but animals astatine nan zoo are perceptive of what’s happening pinch nan humans, conscionable arsenic nan humans are perceiving what’s happening pinch nan animals,” Hartstone-Rose says.

Still, location are immoderate animal behaviors that are possibly easier to explain, specified arsenic mistakenly engaging successful dusk aliases dawn routines. In a 2025 study published successful Science, researchers and organization scientists analyzed astir 100,000 vertebrate calls during nan 2024 full star eclipse. Remarkably, astir half of nan recorded type sang their dawn calls arsenic nan entity lightened pursuing nan event. Similarly, insects specified arsenic fireflies and orb-weaving spiders person been observed during eclipses acting arsenic if it were nighttime.

Eclipses are inherently difficult to study. They seldom hap successful nan aforesaid place, pinch intervals of around 366 years connected average, which makes it intolerable to replicate an experiment. And that deficiency of repeatability successful portion makes it difficult to get funding, Hartstone-Rose says. He’s skipping a travel to wherever this August’s full star eclipse will occur, successful portion because of perchance nonideal viewing conditions and a deficiency of funds.

Still, group attraction astir what happens to animals successful an eclipse. In 2024 hundreds of organization scientists participated successful Hartstone-Rose’s research project, making statement of really animals astir them behaved during nan star eclipse—from pets to workplace animals to chaotic creatures. Hartstone-Rose and his co-authors besides analyzed people’s acquisition of some viewing nan eclipse and taking portion successful science.

People person to nan way of totality felt stronger feelings of awe, he says. “But what was really mind-blowing [was] that group who observed changes successful animal behaviour besides felt importantly stronger feelings of awe and inspiration, and besides stronger feelings of belonging successful science, and that they contributed to science.”

If you’re fortunate capable to drawback this year’s eclipse, Hartstone-Rose recommends paying attraction to your environment. If you’re excited aliases if different group are making a batch of sound aliases commotion astir you, animals mightiness get excited, too.

“As a scientist, I want to get group willing successful subject and quality and being successful nan world. And this is conscionable specified a cool entryway,” Hartstone-Rose says.