How Do Animals React To A Solar Eclipse?

An illustration of a solar eclipse. NASA

You may have heard about the celestial spectacle on August 21 – you know, the one where skywatchers from coast to coast in the US gaze up as the dark disk of the Moon drifts between the Earth and the Sun.

Framed by the pearlescent glow of the corona, a sudden darkness will descend upon the day. And yet, while we know a lot about solar eclipses themselves, we know little about how animals react to the abrupt darkness and temperature drop. 

How exactly do the cows, crickets, and cats of the world react? Anecdotal accounts tell of cows returning to the barn, crickets chirping as if night has fallen, and squirrels retreating to their dens.

But these could just be stories. “If you really want to study behavior in a comprehensive way, you have to spend a lot of time in the field observing and have rigorous protocols in place,” said ecologist Rebecca Johnson at the California Academy of Sciences to National Geographic.

To add more data to the mix, Johnson asks that people participate in Life Responds – a project that has eclipse enthusiasts download a smartphone app called iNaturalist to make observations about an animal’s behavior before, during, and after the solar eclipse this month.

Specifically, they recommend that you scout the area for animals and plants. Once you’ve found your organism of choice, make three separate observations using the iNaturalist app. The first observation should be 30 minutes before totality, the second during the five minutes of totality, and the third 30 minutes after totality. Of course, if you want to be more thorough than that, you can keep more detailed notes.

NASA has also released a map of zoo locations across the country that are within the path of totality and are hosting events.

“During a total solar eclipse, humans are not the only ones to react to one of nature’s most spectacular event,” NASA writes on the site. “When the darkness of totality occurs, some animals may begin their night-time routines among other reactions.”

An animation of the US total solar eclipse on August 21, 2017, with images of the Sun as it appears in a number of locations, oriented to the local horizon. NASA

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