{"id":14412,"date":"2022-07-04T00:00:00","date_gmt":"2022-07-03T22:00:00","guid":{"rendered":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/?post_type=purple_issue&p=14412"},"modified":"2022-09-16T09:06:05","modified_gmt":"2022-09-16T07:06:05","slug":"crowdscience-why-do-animals-migrate","status":"publish","type":"post","link":"https:\/\/c01.purpledshub.com\/bbcsciencefocus\/2022\/07\/04\/crowdscience-why-do-animals-migrate\/","title":{"rendered":"Crowdscience: Why do animals migrate?"},"content":{"rendered":"\n
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CROWDSCIENCE:
<\/span>Why do animals migrate?<\/span><\/strong><\/strong><\/h3>\n\n\n\n

Every week on BBC World Service, CrowdScience <\/em>answers listeners\u2019 questions on life, Earth and the Universe. Tune in every Friday evening on BBC World Service, or catch up online at bbcworldservice.com\/crowdscience<\/a><\/strong><\/span><\/p>\n\n\n\n

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You may have heard about some of the animal kingdom\u2019s epic migrations, such as humpback whales travelling from the poles to the equator, or hundreds of thousands of monarch butterflies arriving in Mexico every winter. Many animals make long, treacherous journeys year after year, so why do they go to all that effort? <\/p>\n\n\n\n

Many birds, mammals, fish, reptiles, amphibians, crustaceans and insects migrate, and they usually do it to find food, a safe place to breed, or a suitable climate. For example, European swallows migrate south every winter to Africa or Asia where the climate is warmer, and food is more plentiful. Flying 320km a day, they use fat reserves to avoid starvation on their long journey. Another famous migration is that of wildebeest in the Serengeti, which follow the seasonal rains that nourish the grasses on which they graze.<\/p>\n\n\n\n