
Beschreibung
National Geographic Readers Great Migrations Each year, as the weather gets colder, monarch butterflies make a mass migration to their winter homes. For them, this trip means life or death. As the air cools, butterflies have a hard time flying. Below 55 degrees farenheit, their wings stiffen making it harder for them to fly long distances. Below 40, their wings paralyze completely. Full description
National Geographic Readers: Great Migrations Whales von Laura Marsh im Online-Buchhandel:

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