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Wild Kratts: Quillber's Birthday Present
It's Aviva's birthday, and Chris and Martin set out to collect porcupine quills for a beautiful necklace with surprising results. Science Concepts: Animals have different ways to defend themselves from predators. Some animals, like porcupines, have highly specialized features designed to ward off predators. Porcupine quills are modified hairs, designed by nature into a deadly defense.
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