ocr: MIGRATION W - - HEN an animal goes on a long I - journey every year to find food, warmth, or: a good breeding place, it migrates. Migration often happens in particular seasons and normally follows a set route that includes a return Spring migration journey. Birds gather to migrate Fall migration to warmer places for winter. The next: spring they return to their breeding grounds. Birds can use the Lesser golden sun, moon, stars, and even the Earth's This bird plover breeds magnetic field to navigate. Birds are in northern North not the only animals that migrate. America and travels to Monarch b ...