You know how birds fly south for the winter to find food and a warmer place to live? Well, some insects do the same thing! Insect migration is when lots of bugs travel from one place to another because they need to find better food, a better place to live, or to escape from cold weather.
For example, monarch butterflies are famous for their migration. They start out in Canada and the United States and fly all the way down to Mexico for the winter. They do this because it gets too cold up north, and there isn't enough food for them. So they fly to Mexico where it's warmer and there's plenty of food to eat.
Some other insects that migrate are dragonflies, ladybugs, and beetles. They might not travel as far as monarch butterflies, but they still move around to find better places to live and eat.
The way insects know where to go is really cool. They use a combination of different things, like the sun, the stars, and even the Earth's magnetic fields to navigate. It's like they have a built-in GPS system in their tiny bug heads!
So there you have it - insect migration is when bugs travel long distances to find better food and a warmer place to live. And they use some pretty cool navigation tricks to get there!