When the Wolves Returned: Restoring Nature's Balance in Yellowstone

When the Wolves Returned: Restoring Nature's Balance in Yellowstone
頁(yè)數(shù):40
Lexile:1040L
AR:6.0
虛構(gòu):非虛構(gòu)
ISBN:9780802796868
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Yellowstone National Park's majestic geologic wonders and remarkable wildlife draw millions of visitors each year. But there was a time when these natural treasures were in great danger, all because after years of unrestricted hunting, one key piece of the puzzle had been eliminated-the wolf.
Now, more than a decade after scientists realized the wolves' essential role and returned them to Yellowstone, the park's natural balance is gradually being restored. The informative dual-level text and spectacular full-color photographs show the wolves in the natural habitat that was almost lost without them. Readers of all ages will be inspired by the delicate natural system that is Yellowstone.

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