Some animals travel relatively short distances to find food or more favorable living or breeding conditions. Most animals that migrate do so to find food or more livable conditions. Some animals migrate to breed. The Atlantic Salmon begins its life in a river and migrates downstream to the ocean.
What do animals depend on to migrate?
Animals use a variety of cues to determine when it is time to migrate. Some migrations are triggered by external cues, like changing daylight hours or temperature. … Some animals rely on the position of the sun, moon, or stars, some use smell, and still others use the magnetic field of the Earth to guide them.
Why do animals migrate 8?
They migrate to avoid suffering from thrilling heat or cold that imparts a tremendous impact on the availability of food for certain species. Birds and animals leave such harsh conditions and look for some different habitat where they can stay comfortably and have food to survive.
How do animals migrate without getting lost?
But according to an increasingly popular theory, birds and other animals use a radical pair-based compass to “see” the Earth’s magnetic field, allowing them to undertake great migrations and daring rescues without getting lost.
What is the most obvious cause of migration?
The most obvious cause of migration is the disparity in levels of income, employment and social well-being between differing areas. Differences in demographic patterns with regard to fertility, mortality, age-structure and labourforce growth are also important (Hugo 1998).
What are the major causes of migration?
4 Major Causes of Migration in India
- Marriage: Marriage is a very important social factor of migration. …
- Employment: ADVERTISEMENTS: …
- Education: …
- Lack of Security: