A total solar eclipse occurs when the Moon passes directly in front of the Sun, blocking its light from reaching parts of the planet. In areas where the Sun’s light is completely blocked – known as the path of totality – it looks as if dusk has fallen, temperatures drop, and some stars become visible. These changes can trick animals into altering their usual daytime behaviors. A total solar eclipse will pass over the heads of over 30 million people in North America on April 8, 2024, providing the perfect opportunity for a large-scale citizen science project.