How Animals React During Total Solar Eclipses: What Researchers Have Documented
Researchers have documented consistent and wide-ranging behavioral changes in animals during total solar eclipses, with approximately 75% of observed species displaying a response and most engaging in established evening behaviors, according to studies of the April 2024 eclipse (National Wildlife Federation). The findings, drawn from multiple eclipses across continents and years, describe a pattern in which daylight-dependent species wind down and nocturnal ones activate as totality approaches.
The most frequently observed animal response during the April 2024 total solar eclipse was the assumption of evening behaviors, such as returning to nighttime roosting locations (Houston Public Media). Bees stop buzzing and return to their hives; birds stop singing and engage in roosting behaviors; crickets begin chirping; and owls start hooting (New York Times; U.S. Fish & Wildlife Service). The New York Times, reporting ahead of the August 12, 2026 total solar eclipse visible in Europe, confirms these same patterns have been documented across multiple eclipse events (New York Times).
A study of wild birds published in Science in October 2025 found that more than half of wild bird species changed their biological rhythms during a total solar eclipse, with many producing a dawn chorus in the aftermath of totality (Science). A separate continental-scale study corroborates that birds stop singing and shift to nighttime behaviors during the period of darkness (Nature). The post-eclipse dawn chorus phenomenon suggests that at least some avian species interpret the return of light as a new morning, resetting their circadian vocalization patterns.
Zoo animals exhibit more varied and sometimes more pronounced stress responses. A study published in July 2026 found that Japanese macaques displayed the most behavioral changes among zoo species, moving to higher locations in their enclosures and standing still and quiet during totality (Wiley). Other zoo species, including zebras, camels, and certain birds, also displayed signs of stress, with some climbing high in trees (ScienceX). Domestic pets may express anxiety during the eclipse as well (New York Times), though the evidence base for companion animal reactions is less systematic than for wildlife and zoo populations.
Nocturnal animals, conversely, may begin to become active as the eclipse progresses and light diminishes (National Wildlife Federation). Researchers have also studied the impact of annular solar eclipses on animal behavior, including the December 26, 2019 annular eclipse, suggesting the phenomenon extends beyond total eclipses, though the behavioral effects are presumably less pronounced given the retained ambient light (Nature).
The broader context here is that these repeated, cross-species findings point to a deep evolutionary sensitivity to ambient light levels across taxa. The consistency of the response — evening behaviors triggered by a transient drop in irradiance rather than an actual sunset — suggests that the circadian and crepuscular cues governing animal behavior are tuned to light thresholds rather than to time-of-day mechanisms alone. The post-eclipse dawn chorus observed in birds reinforces this interpretation: the return of light triggers morning-typical behavior regardless of the actual time.
For researchers preparing to observe the August 12, 2026 eclipse across Europe, these prior findings offer a baseline of expected behaviors. The macaque stress response, the avian dawn chorus rebound, and the near-universal shift toward evening routines in diurnal species provide a comparative framework for assessing whether the 2026 eclipse produces consistent or novel behavioral signatures. The varying duration of totality, geographic latitude, and local ecology at European observation sites could each modulate the strength and type of responses observed.
