migrate
Definition
Migration is the regular movement of animals or people from one place to another. Migration can be seasonal, meaning that it happens at the same time of year every year. Or, it can be more irregular, happening in response to changes in the environment.
There are many reasons why animals and people migrate. Animals migrate to find food, water, or a better climate. People migrate to find work, education, or a better life.
Animals that migrate often travel long distances. For example, some birds fly from North America to South America every winter. Fish that migrate often swim long distances. For example, some salmon swim from the ocean to freshwater streams to spawn.
People who migrate often travel long distances as well. For example, refugees may travel from their home country to a new country in search of safety. Immigrants may travel from one country to another to find work or a better life.
Migration can have a significant impact on the environment. For example, when animals migrate, they can spread seeds and nutrients. People who migrate can also bring new ideas and cultures to new places.
How can the word be used?
The wildebeest migrate across the Serengeti in search of food.
Different forms of the word
Noun: The act of moving from one place to another, especially in search of food or a better climate.
Adjective: Relating to migration.
Verb: To move from one place to another, especially in search of food or a better climate.
Etymology
The word "migrate" comes from the Latin word "migrāre," which means "to move from one place to another." The word "migrāre" is derived from the Proto-Indo-European root "mei-," which means "to change.".
The word "migrate" was first used in English in the 14th century. It was originally used to describe the movement of birds, but it soon came to be used to describe the movement of people as well.
Question
What happens when birds migrate?
AQA Science Exam Question and Answer
Question:
Explain the concept of animal migration and provide examples of why and how certain species undertake migratory journeys.
Answer:
Animal migration is the seasonal movement of animals from one region to another, typically driven by changes in food availability, temperature, or breeding conditions. This behaviour is observed in a wide range of species, including birds, mammals, fish, and insects.
Migration serves various purposes, primarily centred around survival and reproduction. For instance, many bird species migrate to avoid harsh winter conditions and scarcity of food. The Arctic Tern, known for the longest migration route, travels from the Arctic to the Antarctic and back, covering thousands of miles to ensure access to food-rich areas.
Breeding is another key driver of migration. Salmon, for instance, migrate from the ocean to freshwater rivers to spawn, as the freshwater environment offers a safer place for their eggs to develop.
Environmental cues such as changes in daylight and magnetic fields help guide migrating animals along their routes. Some species, like monarch butterflies, navigate using a combination of internal biological clocks and celestial cues.
Human activities, including habitat loss and climate change, can impact migration patterns. Changes in the availability of resources along migration routes can disrupt the animals' journeys and even lead to population declines.