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Challenge Question #6mes (mes@yosemite.net)Thu, 05 Mar 1998 10:56:48 -0800
School in Mariposa, California answers: #1. Our class thinks the monarchs know when to go because many things change in Mexico. The temperature gets much warmer in Mexico and the sky clears up. They can tell that they have been in Mexico for a long time, a whole season, and must feel that they've been there long enough. They have a natural instinct that when it starts getting too hot, it's time to migrate to cooler climates. They can feel it with the the new season. #2. There are many bad consequences for leaving Mexico too early and too late. If they leave too late, the weather is way too hot. The monarchs have very delicate bodies and can't stand severe heat. Also, all their food will dry up without enough water. If they leave too early, they have to travel in cold weather, often in storms. They can't handle it. In the winter, their food is too
little and they will die.
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