How darkness might save migratory birds?

Darkness might help migratory birds find their way home by giving them a special kind of map to follow.

Imagine you're playing hide and seek at night. It's easier to see where your friends are hiding because the lights from the street lamps shine on them. But if it’s completely dark, like when there’s no moon or clouds block out all the light, it’s harder to tell where things are, but that might help some birds!

Migratory birds use stars as their guide when they fly long distances. It's like having a map in the sky, and they follow it to find their way home.

But sometimes, especially when there are clouds or no moon, the sky gets really dark, almost like a black blanket covering everything. This darkness might help birds see something special: the Earth’s magnetic field. It’s like a hidden path under their feet that helps them know which direction to fly.

Sometimes too much light can confuse birds, just like how it's harder for you to find your friend in hide and seek when there are too many bright lights around.

So, darkness might save migratory birds by helping them use their hidden map, the Earth’s magnetic field, to travel safely.