It is the highlight of the year! The Great American Eclipse will be taking place on August 21, with the best views in ten different cities across the country.

But humans will not be the only ones affected by the solar eclipse.

According to scientific studies, animals will be acting strangely as well.

“Eclipse chasers say they have seen songbirds go quiet, large farm animals lie down, crickets start to chirp, and chickens begin to roost,” the Los Angeles Times reports.

Scientists say that the time when the sun is fully covered by the moon, though brief, is capable of affecting animals who determine what to do with the aid of light cues.

“Certain stimuli can overrule normal behavior without affecting an animal’s daily physiological rhythms,” said Joanna Chiu, who studies animal circadian clocks at the University of California, Davis, to the Los Angeles Times.

Various observers have noted changes in the behaviors of llamas, whales and dolphins, birds, fish and even spiders. In fact, a study in Veracruz, Mexico discovered that some orb-weaver spiders dismantle their webs during the eclipse, only rebuilding them once sunlight is visible.

The eclipse on Monday can affect house pets, so do not be frightened if they act strangely.