Migration

A detailed Summary of Migration

Every year hundreds of birds, mammals, and insects par take in a roundtrip journey to find a warmer climate, a better reproductive environment, and more food. Three species in particular that make this migration every year are the golden cheeked warbler, the whooping crane, and the monarch butterfly. Also, scientists believe they have figured out why these animals never wander off course or get lost. Scientists have carefully tracked several species to try to fully understand their migration behavior.

The golden - cheeked warbler is a bird that migrates twice a year. From mid - March to late July these birds can be found in central Texas. They call the Ashe Juniper trees home, and these trees are also their breeding sites. When July finally comes around the baby warblers have grown enough to make the migration and it commences. All of the warblers head south to find more food. From late July to mid - March the warblers are somewhere in Mexico and South America. According to the National Wildlife Federation their winter home is not specifically denoted (4). However, wherever they call home in our winter they find ample food to make it back to Texas again in March.

According to some scientists, there is evidence that shows migration routes are "hard - wired into the animals' brains. A migrating animal, called a loggerhead turtle, became the focus of one of their studies. These turtles, as hatchlings, can sense the Earth's magnetic field. To test this "hard - wired" sensor biologist Kenneth Lohmann and some of his colleagues collected the baby turtles from their nests and, while exposing them to magnetic fields, studied their behavior. There were seventy-nine turtles outfitted in a suit equipped with a tracking system. The next step was to place the turtles in a tank that had magnetic fields generated through it. These magnetic fields simulated those in northern Florida, northeastern Portugal, and southern Gyre. Lohmann says "We found that turtles followed their migratory route" (3). Even though these turtles had never been exposed to water, they responded to the magnetic waves the way they would have in the ocean. However, the scientists do not yet know what part of the brain is involved in magnetic field sensory. The scientists do feel however, that different species inherited different "instructions" so they plan on doing further testing to see if they can prove their hypothesis.

Scientists at the University of Illinois feel that they have at least part of the brain that helps animals migra

Some common words found in the essay are:
Texas March, , Klaus Schulten, University Illinois, America Shortly, Kenneth Lohmann, Gyre Lohmann, Ashe Juniper, Mexico California, Wildlife Federation, magnetic fields, late march, golden cheeked, cheeked warbler, whooping crane, magnetic field, golden cheeked warbler, monarch butterfly, monarch butterfly scientists, butterfly scientists, mid march, mid september,

Approximate Word count = 912
Approximate Pages = 4 (250 words per page double spaced)

Category: Science

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Migration

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