Environmental News Network: Migration is a strategy used by many mammals in order to take advantage of food, shelter, and water that vary with seasons. Interestingly, there is strong evidence that genetics plays a role in migratory behavior that animals inherit. Many species rely not only on their senses to help them navigate, but they can also use mental maps to guide them to where they are supposed to go. But with considerable human development, how are animals supposed to find their way? According to research conducted...