How do geese know to come back?

Geese return to specific locations due to a combination of instinct, learned behavior, and environmental cues. They rely on migratory routes passed down through generations, using visual landmarks and the Earth's magnetic field for navigation. Additionally, changes in daylight length and temperature trigger their migratory instincts, signaling the time to return to breeding grounds. This innate behavior ensures they arrive at optimal locations for feeding and nesting.