نشانه های بهار: پرندگان مهاجر، راه بازگشت به خانه را می یابند -‏ قسمت ۱ از ۲

Why do we migrants leave the coziness of our homes? Most humans wouldn’t like to do so. But in our case, migration is essential for survival. With the coming of winter we worry whether there will be enough food. We rely on having constant and various food resources. Therefore, we know when it’s time to move somewhere else that has ample food to meet our needs.